Lighthouse Mobile

· 0 checks — Mobile Lighthouse audit -- Performance, Accessibility, Best Practices, and SEO category breakdown.

SCORE

GRADE

FIX

REVIEW

PASS

INFO

Detailed Report

Audit breakdown by category with detailed findings.

Performance

Insights

Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Polyfills and transforms enable older browsers to use new JavaScript features. However, many aren't necessary for modern browsers. Consider modifying your JavaScript build process to not transpile Baseline features, unless you know you must support older browsers. Learn why most sites can deploy ES6+ code without transpiling

Why this matters

Performance issues directly impact user engagement and conversion rates.

3rd party code can significantly impact load performance. Reduce and defer loading of 3rd party code to prioritize your page's content.

Why this matters

Performance issues directly impact user engagement and conversion rates.

A long cache lifetime can speed up repeat visits to your page. Learn more about caching.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Request	Cache TTL	Transfer Size
nc.iucnredlist.org/redlist/news_snippets/images/1776233983-european-red-list.png	14400.0 s	486.8 KiB
/redlist/news_snippets/images/1776239000-mobula-rays_nick...	14400.0 s	318.6 KiB
/redlist/amazing-species/nepenthes-rigidifolia1/images/ne...	14400.0 s	257.6 KiB
/redlist/amazing-species/encephalartos-middelburgensis/im...	14400.0 s	252.8 KiB
/redlist/amazing-species/cinclodes-palliatus/images/new_t...	14400.0 s	171.1 KiB
/redlist/partners/images/1759307948-Senckenberg-Logo_EN_B...	14400.0 s	76.2 KiB
nc.iucnredlist.org/redlist/partners/images/1676021330-ZSL_Stacked_RGB_trans.png	14400.0 s	74.7 KiB
/redlist/news_snippets/images/1775728347-Emperor_penguins...	14400.0 s	66.8 KiB
/redlist/species-of-the-day/eriocnemis-nigrivestis/images...	14400.0 s	65.7 KiB
/redlist/partners/images/1587554421-Missouri_Botanical_Ga...	14400.0 s	33.3 KiB
nc.iucnredlist.org/redlist/partners/images/1521111901-sapienza.png	14400.0 s	30.9 KiB
/redlist/partners/images/1607600142-2_biopark_logo_4c_squ...	14400.0 s	30.7 KiB
nc.iucnredlist.org/redlist/partners/images/1521112055-ssc.png	14400.0 s	26.2 KiB
/redlist/partners/images/1620305979-NatureServe_new_logo_...	14400.0 s	23.7 KiB
www.google-analytics.com/analytics.js	7200.0 s	20.9 KiB
nc.iucnredlist.org/redlist/partners/images/1521112040-asu.png	14400.0 s	22.8 KiB
nc.iucnredlist.org/redlist/partners/images/1521111966-bird.png	14400.0 s	21.6 KiB
nc.iucnredlist.org/redlist/partners/images/1521111861-kew.png	14400.0 s	18.6 KiB
nc.iucnredlist.org/redlist/partners/images/1521111931-CI.png	14400.0 s	16.7 KiB
nc.iucnredlist.org/redlist/partners/images/1521111824-tamu.png	14400.0 s	16.6 KiB
/cdn-cgi/challenge-platform/h/b/scripts/jsd/0b8fb825cb67/...	14400.0 s	11.3 KiB
nc.iucnredlist.org/redlist/partners/images/1521112071-iucn.png	14400.0 s	10.0 KiB
nc.iucnredlist.org/redlist/partners/images/1729099754-BGCI_Logo_2_sm.png	14400.0 s	9.9 KiB
/redlist/partners/images/1629290618-Rewild_Logo_Primary_s...	14400.0 s	9.7 KiB
/beacon.min.js/v8c78df7c7c0f484497ecbca7046644da177152312...	86400.0 s	10.7 KiB
/cdn-cgi/scripts/7d0fa10a/cloudflare-static/rocket-loader...	2871.0 s	4.1 KiB
/cdn-cgi/scripts/5c5dd728/cloudflare-static/email-decode....	2871.0 s	992 B

Your first network request is the most important. Reduce its latency by avoiding redirects, ensuring a fast server response, and enabling text compression.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Consider setting font-display to swap or optional to ensure text is consistently visible. swap can be further optimized to mitigate layout shifts with font metric overrides.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Est Savings
/assets/Roboto-italic-884e654cef00224110fc62cdf8f1561ff08...	25 ms
/assets/Roboto-700italic-c9d5a0e6287ab6c0d3e7c80ebdeb2642...	25 ms
/assets/Roboto-regular-47107401d0adb375ab9aa167f9d62489a8...	20 ms
/assets/Roboto-700-8e44376b735dcc9027acbcc8a0df64c3f886a2...	20 ms
/assets/Roboto-500italic-e14046ef7db1a19b5ee3b1f13cd76bc1...	15 ms
/assets/Roboto-500-96025fe9db6578d8bc7f4b8be739750b1490e0...	10 ms

Reducing the download time of images can improve the perceived load time of the page and LCP. Learn more about optimizing image size

Why this matters

Performance issues directly impact user engagement and conversion rates.

	URL	Resource Size	Est Savings
div.cards > article.card > div.layout-card-minor > img.card__thumbnail `div.cards > article.card > div.layout-card-minor > img.card__thumbnail`	nc.iucnredlist.org/redlist/news_snippets/images/1776233983-european-red-list.png	485.8 KiB	472.9 KiB
div.cards > article.card > div.layout-card-minor > img.card__thumbnail `div.cards > article.card > div.layout-card-minor > img.card__thumbnail`	/redlist/news_snippets/images/1776239000-mobula-rays_nick...	317.7 KiB	304.7 KiB
div#page > div.layout-iconic-species-banner > a > img `div#page > div.layout-iconic-species-banner > a > img`	/assets/home/red_list_60_campaign_banner-6ad140626da42936...	242.9 KiB	241.6 KiB
section.section > div.cards > article.card > img.card__thumbnail--search `section.section > div.cards > article.card > img.card__thumbnail--search`	/redlist/amazing-species/nepenthes-rigidifolia1/images/ne...	256.9 KiB	238.6 KiB
section.section > div.cards > article.card > img.card__thumbnail--search `section.section > div.cards > article.card > img.card__thumbnail--search`	/redlist/amazing-species/encephalartos-middelburgensis/im...	252.1 KiB	233.8 KiB
Main Image `div.layout-pair__section > div.layout-pair__section__minor > figure > img`	/assets/home/green_turtle-0260cf7fba13a743876327096e88369...	234.9 KiB	218.6 KiB
section.section > div.cards > article.card > img.card__thumbnail--search `section.section > div.cards > article.card > img.card__thumbnail--search`	/redlist/amazing-species/cinclodes-palliatus/images/new_t...	170.4 KiB	152.2 KiB
ul.list-partners > li.list-partners__item > a > img.partner `ul.list-partners > li.list-partners__item > a > img.partner`	/redlist/partners/images/1759307948-Senckenberg-Logo_EN_B...	75.6 KiB	75.5 KiB
ZSL `ul.list-partners > li.list-partners__item > a > img.partner`	nc.iucnredlist.org/redlist/partners/images/1676021330-ZSL_Stacked_RGB_trans.png	74.1 KiB	73.9 KiB
div.cards > article.card > div.layout-card-minor > img.card__thumbnail `div.cards > article.card > div.layout-card-minor > img.card__thumbnail`	/redlist/news_snippets/images/1775728347-Emperor_penguins...	66.2 KiB	53.3 KiB
section.section > div.cards > article.card > img.card__thumbnail--search `section.section > div.cards > article.card > img.card__thumbnail--search`	/redlist/species-of-the-day/eriocnemis-nigrivestis/images...	65.1 KiB	46.9 KiB
ul.list-partners > li.list-partners__item > a > img.partner `ul.list-partners > li.list-partners__item > a > img.partner`	/redlist/partners/images/1587554421-Missouri_Botanical_Ga...	32.8 KiB	31.7 KiB
ul.list-partners > li.list-partners__item > a > img.partner `ul.list-partners > li.list-partners__item > a > img.partner`	/redlist/partners/images/1607600142-2_biopark_logo_4c_squ...	30.2 KiB	30.0 KiB
Sapienza - Università di Roma `ul.list-partners > li.list-partners__item > a > img.partner`	nc.iucnredlist.org/redlist/partners/images/1521111901-sapienza.png	30.4 KiB	29.2 KiB
SSC `ul.list-partners > li.list-partners__item > a > img.partner`	nc.iucnredlist.org/redlist/partners/images/1521112055-ssc.png	25.7 KiB	24.5 KiB
NatureServe `ul.list-partners > li.list-partners__item > a > img.partner`	/redlist/partners/images/1620305979-NatureServe_new_logo_...	23.2 KiB	23.0 KiB
ASU `ul.list-partners > li.list-partners__item > a > img.partner`	nc.iucnredlist.org/redlist/partners/images/1521112040-asu.png	22.4 KiB	21.5 KiB
BirdLife International `ul.list-partners > li.list-partners__item > a > img.partner`	nc.iucnredlist.org/redlist/partners/images/1521111966-bird.png	21.2 KiB	19.6 KiB
Royal Botanic Gardens Kew `ul.list-partners > li.list-partners__item > a > img.partner`	nc.iucnredlist.org/redlist/partners/images/1521111861-kew.png	18.1 KiB	17.2 KiB
Texas A & M University `ul.list-partners > li.list-partners__item > a > img.partner`	nc.iucnredlist.org/redlist/partners/images/1521111824-tamu.png	16.1 KiB	15.2 KiB
Conservation International `ul.list-partners > li.list-partners__item > a > img.partner`	nc.iucnredlist.org/redlist/partners/images/1521111931-CI.png	16.2 KiB	14.7 KiB
IUCN `ul.list-partners > li.list-partners__item > a > img.partner`	nc.iucnredlist.org/redlist/partners/images/1521112071-iucn.png	9.4 KiB	8.8 KiB
ul.list-partners > li.list-partners__item > a > img.partner `ul.list-partners > li.list-partners__item > a > img.partner`	nc.iucnredlist.org/redlist/partners/images/1729099754-BGCI_Logo_2_sm.png	9.5 KiB	8.0 KiB
ul.list-partners > li.list-partners__item > a > img.partner `ul.list-partners > li.list-partners__item > a > img.partner`	/redlist/partners/images/1629290618-Rewild_Logo_Primary_s...	9.2 KiB	5.4 KiB

Optimize LCP by making the LCP image discoverable from the HTML immediately, and avoiding lazy-loading

Why this matters

Performance issues directly impact user engagement and conversion rates.

lhId: page-10-IMG

nodeLabel: section.section > div.cards > article.card > img.card__thumbnail--search

path: 1,HTML,1,BODY,1,DIV,6,MAIN,0,DIV,0,SECTION,1,DIV,0,ARTICLE,0,IMG

selector: section.section > div.cards > article.card > img.card__thumbnail--search

snippet: <img src="https://nc.iucnredlist.org/redlist/species-of-the-day/eriocnemis-nigrivest…" class="card__thumbnail--search" alt="">

Avoid chaining critical requests by reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.

Why this matters

Performance issues directly impact user engagement and conversion rates.

description: [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints help the browser establish a connection earlier in the page load, saving time when the first request for that origin is made. The following are the origins that the page preconnected to.

title: Preconnected origins

value: no origins were preconnected

description: Add [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints to your most important origins, but try to use no more than 4.

title: Preconnect candidates

Requests are blocking the page's initial render, which may delay LCP. Deferring or inlining can move these network requests out of the critical path.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Transfer Size	Duration
cdn.datatables.net/1.10.16/css/jquery.dataTables.min.css	2.4 KiB	769 ms
/assets/application-4f5d58ea22d47a910d1dec301f5059c802381...	37.9 KiB	918 ms

These insights are also available in the Chrome DevTools Performance Panel - record a trace to view more detailed information.

Time to Interactive is the amount of time it takes for the page to become fully interactive. Learn more about the Time to Interactive metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

TTI

The maximum potential First Input Delay that your users could experience is the duration of the longest task. Learn more about the Maximum Potential First Input Delay metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Redirects introduce additional delays before the page can be loaded. Learn how to avoid page redirects.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 782 ms

URL	Time Spent
iucnredlist.org/	782 ms
www.iucnredlist.org/	0.0 ms

Diagnostics

Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity. Learn how to reduce unused CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 0.0 ms 32.5 KiB

URL	Transfer Size	Est Savings
/assets/application-4f5d58ea22d47a910d1dec301f5059c802381...	37.5 KiB	32.5 KiB

Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity. Learn how to reduce unused JavaScript.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 5.5 s 1.0 MiB

URL	Transfer Size	Est Savings
nrl.iucnredlist.org/packs/redlist-91968a82c64c481f2989.js	1.4 MiB	637.8 KiB
www.googletagmanager.com/gtag/js?id=UA-11409245-6&cx=c&gtm=4e64h1	124.9 KiB	65.4 KiB
www.googletagmanager.com/gtag/js?id=UA-11409245-5&cx=c&gtm=4e64h1	124.9 KiB	65.4 KiB
www.googletagmanager.com/gtag/js?id=G-T3K17G40FC&cx=c&gtm=4e64h1	145.8 KiB	64.9 KiB
www.googletagmanager.com/gtag/js?id=G-6HJED7KZLB&cx=c&gtm=4e64h1	145.8 KiB	64.9 KiB
www.googletagmanager.com/gtag/js?id=UA-11409245-4	125.0 KiB	63.5 KiB
www.googletagmanager.com/gtag/js?id=G-66YGJWTDLZ&cx=c&gtm=4e64h1	145.8 KiB	63.1 KiB
/assets/application-38c0ffd83a61759780bd4ed4d32e23b4c0789...	137.4 KiB	24.0 KiB

Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to reduce Javascript execution time.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Total CPU Time	Script Evaluation	Script Parse
nrl.iucnredlist.org/packs/redlist-91968a82c64c481f2989.js	2.2 s	1.4 s	721 ms
www.iucnredlist.org/	1.3 s	58 ms	4.3 ms
Unattributable	1.3 s	120 ms	0.0 ms
www.iucnredlist.org/cdn-cgi/challenge-platform/scripts/jsd/main.js	925 ms	881 ms	18 ms
www.googletagmanager.com/gtag/js?id=G-6HJED7KZLB&cx=c&gtm=4e64h1	360 ms	283 ms	74 ms
www.googletagmanager.com/gtag/js?id=G-T3K17G40FC&cx=c&gtm=4e64h1	336 ms	268 ms	65 ms
www.googletagmanager.com/gtag/js?id=UA-11409245-5&cx=c&gtm=4e64h1	331 ms	230 ms	60 ms
/cdn-cgi/scripts/7d0fa10a/cloudflare-static/rocket-loader...	316 ms	184 ms	6.4 ms
www.googletagmanager.com/gtag/js?id=UA-11409245-6&cx=c&gtm=4e64h1	258 ms	194 ms	58 ms
www.googletagmanager.com/gtag/js?id=G-66YGJWTDLZ&cx=c&gtm=4e64h1	252 ms	187 ms	62 ms
www.googletagmanager.com/gtag/js?id=UA-11409245-4	242 ms	181 ms	57 ms
/assets/application-38c0ffd83a61759780bd4ed4d32e23b4c0789...	166 ms	91 ms	70 ms
www.google-analytics.com/analytics.js	114 ms	73 ms	39 ms
/beacon.min.js/v8c78df7c7c0f484497ecbca7046644da177152312...	76 ms	30 ms	5.9 ms

Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to minimize main-thread work

Why this matters

Performance issues directly impact user engagement and conversion rates.

Category	Time Spent
Script Evaluation	4.2 s
Other	1.4 s
Script Parsing & Compilation	1.2 s
Style & Layout	737 ms
Rendering	380 ms
Garbage Collection	145 ms
Parse HTML & CSS	95 ms

Large network payloads cost users real money and are highly correlated with long load times. Learn how to reduce payload sizes.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Transfer Size
nrl.iucnredlist.org/packs/redlist-91968a82c64c481f2989.js	1.4 MiB
nc.iucnredlist.org/redlist/news_snippets/images/1776233983-european-red-list.png	486.8 KiB
/redlist/news_snippets/images/1776239000-mobula-rays_nick...	318.6 KiB
/redlist/amazing-species/nepenthes-rigidifolia1/images/ne...	257.6 KiB
/redlist/amazing-species/encephalartos-middelburgensis/im...	252.8 KiB
/assets/home/red_list_60_campaign_banner-6ad140626da42936...	243.6 KiB
/assets/home/green_turtle-0260cf7fba13a743876327096e88369...	235.6 KiB
/redlist/amazing-species/cinclodes-palliatus/images/new_t...	171.1 KiB
www.googletagmanager.com/gtag/js?id=G-66YGJWTDLZ&cx=c&gtm=4e64h1	145.9 KiB
www.googletagmanager.com/gtag/js?id=G-6HJED7KZLB&cx=c&gtm=4e64h1	145.8 KiB

Set an explicit width and height on image elements to reduce layout shifts and improve CLS. Learn how to set image dimensions

Why this matters

Performance issues directly impact user engagement and conversion rates.

	URL
ul.list-partners > li.list-partners__item > a > img.partner `ul.list-partners > li.list-partners__item > a > img.partner`	/redlist/partners/images/1759307948-Senckenberg-Logo_EN_B...
ZSL `ul.list-partners > li.list-partners__item > a > img.partner`	nc.iucnredlist.org/redlist/partners/images/1676021330-ZSL_Stacked_RGB_trans.png
NatureServe `ul.list-partners > li.list-partners__item > a > img.partner`	/redlist/partners/images/1620305979-NatureServe_new_logo_...
Main Image `div.layout-pair__section > div.layout-pair__section__minor > figure > img`	/assets/home/green_turtle-0260cf7fba13a743876327096e88369...
ul.list-partners > li.list-partners__item > a > img.partner `ul.list-partners > li.list-partners__item > a > img.partner`	/redlist/partners/images/1607600142-2_biopark_logo_4c_squ...
div.cards > article.card > div.layout-card-minor > img.card__thumbnail `div.cards > article.card > div.layout-card-minor > img.card__thumbnail`	nc.iucnredlist.org/redlist/news_snippets/images/1776233983-european-red-list.png
div.cards > article.card > div.layout-card-minor > img.card__thumbnail `div.cards > article.card > div.layout-card-minor > img.card__thumbnail`	/redlist/news_snippets/images/1775728347-Emperor_penguins...
div.cards > article.card > div.layout-card-minor > img.card__thumbnail `div.cards > article.card > div.layout-card-minor > img.card__thumbnail`	/redlist/news_snippets/images/1776239000-mobula-rays_nick...
section.section > div.cards > article.card > img.card__thumbnail--search `section.section > div.cards > article.card > img.card__thumbnail--search`	/redlist/species-of-the-day/eriocnemis-nigrivestis/images...
section.section > div.cards > article.card > img.card__thumbnail--search `section.section > div.cards > article.card > img.card__thumbnail--search`	/redlist/amazing-species/encephalartos-middelburgensis/im...
section.section > div.cards > article.card > img.card__thumbnail--search `section.section > div.cards > article.card > img.card__thumbnail--search`	/redlist/amazing-species/cinclodes-palliatus/images/new_t...
section.section > div.cards > article.card > img.card__thumbnail--search `section.section > div.cards > article.card > img.card__thumbnail--search`	/redlist/amazing-species/nepenthes-rigidifolia1/images/ne...
div#page > div.layout-iconic-species-banner > a > img `div#page > div.layout-iconic-species-banner > a > img`	/assets/home/red_list_60_campaign_banner-6ad140626da42936...
ul.list-partners > li.list-partners__item > a > img.partner `ul.list-partners > li.list-partners__item > a > img.partner`	/redlist/partners/images/1587554421-Missouri_Botanical_Ga...
ul.categories__frame__slides > li.card > div.layout-card-minor > img.u--padding-lg `ul.categories__frame__slides > li.card > div.layout-card-minor > img.u--padding-lg`	/assets/category-lg/category-lg_dd-3c0d0ae8cd2f4488acf46a...
ul.categories__frame__slides > li.card > div.layout-card-minor > img.u--padding-lg `ul.categories__frame__slides > li.card > div.layout-card-minor > img.u--padding-lg`	/assets/category-lg/category-lg_lc-d3731e342769efbfd4604f...
ul.categories__frame__slides > li.card > div.layout-card-minor > img.u--padding-lg `ul.categories__frame__slides > li.card > div.layout-card-minor > img.u--padding-lg`	/assets/category-lg/category-lg_nt-b1b4d7e271e9257d722fa2...
ul.categories__frame__slides > li.card > div.layout-card-minor > img.u--padding-lg `ul.categories__frame__slides > li.card > div.layout-card-minor > img.u--padding-lg`	/assets/category-lg/category-lg_vu-a498d553d90492b82044d2...
ul.categories__frame__slides > li.card > div.layout-card-minor > img.u--padding-lg `ul.categories__frame__slides > li.card > div.layout-card-minor > img.u--padding-lg`	/assets/category-lg/category-lg_en-3d09fbfbe01ad6207d5ba4...
ul.categories__frame__slides > li.card > div.layout-card-minor > img.u--padding-lg `ul.categories__frame__slides > li.card > div.layout-card-minor > img.u--padding-lg`	/assets/category-lg/category-lg_cr-3ec06b34573557e2b90a84...
ul.categories__frame__slides > li.card > div.layout-card-minor > img.u--padding-lg `ul.categories__frame__slides > li.card > div.layout-card-minor > img.u--padding-lg`	/assets/category-lg/category-lg_ew-d3e64d0f3ef6f89a4406dc...
ul.categories__frame__slides > li.card > div.layout-card-minor > img.u--padding-lg `ul.categories__frame__slides > li.card > div.layout-card-minor > img.u--padding-lg`	/assets/category-lg/category-lg_ex-5aa9fe2bfb20930fdec6d1...
ul.categories__frame__slides > li.card > div.layout-card-minor > img.u--padding-lg `ul.categories__frame__slides > li.card > div.layout-card-minor > img.u--padding-lg`	/assets/category-lg/category-lg_ne-4ba5db90bdb573b08059b7...
BirdLife International `ul.list-partners > li.list-partners__item > a > img.partner`	nc.iucnredlist.org/redlist/partners/images/1521111966-bird.png
Conservation International `ul.list-partners > li.list-partners__item > a > img.partner`	nc.iucnredlist.org/redlist/partners/images/1521111931-CI.png
SSC `ul.list-partners > li.list-partners__item > a > img.partner`	nc.iucnredlist.org/redlist/partners/images/1521112055-ssc.png
Sapienza - Università di Roma `ul.list-partners > li.list-partners__item > a > img.partner`	nc.iucnredlist.org/redlist/partners/images/1521111901-sapienza.png
ul.list-partners > li.list-partners__item > a > img.partner `ul.list-partners > li.list-partners__item > a > img.partner`	/redlist/partners/images/1629290618-Rewild_Logo_Primary_s...
Royal Botanic Gardens Kew `ul.list-partners > li.list-partners__item > a > img.partner`	nc.iucnredlist.org/redlist/partners/images/1521111861-kew.png
ASU `ul.list-partners > li.list-partners__item > a > img.partner`	nc.iucnredlist.org/redlist/partners/images/1521112040-asu.png
Texas A & M University `ul.list-partners > li.list-partners__item > a > img.partner`	nc.iucnredlist.org/redlist/partners/images/1521111824-tamu.png
div.panels > div.bg-brand-darker > div.layout-panel-minor > img.feature__icon `div.panels > div.bg-brand-darker > div.layout-panel-minor > img.feature__icon`	/assets/icons/taxonomy-cycad-9947f4c78f5b51f53c1041f647d0...
IUCN `ul.list-partners > li.list-partners__item > a > img.partner`	nc.iucnredlist.org/redlist/partners/images/1521112071-iucn.png
div.panels > div.bg-brand-darker > div.layout-panel-minor > img.feature__icon `div.panels > div.bg-brand-darker > div.layout-panel-minor > img.feature__icon`	/assets/icons/taxonomy-reptile-9ac37b8f147fc77dc365dd9a95...
ul.list-partners > li.list-partners__item > a > img.partner `ul.list-partners > li.list-partners__item > a > img.partner`	nc.iucnredlist.org/redlist/partners/images/1729099754-BGCI_Logo_2_sm.png
div.panels > div.bg-brand-darker > div.layout-panel-minor > img.feature__icon `div.panels > div.bg-brand-darker > div.layout-panel-minor > img.feature__icon`	/assets/icons/taxonomy-crustaceans-02ab4506e96e6a1bd5152e...
div.panels > div.bg-brand-darker > div.layout-panel-minor > img.feature__icon `div.panels > div.bg-brand-darker > div.layout-panel-minor > img.feature__icon`	/assets/icons/taxonomy-mammals-7617735825d78d25d3b3ebc80e...
div.panels > div.bg-brand-darker > div.layout-panel-minor > img.feature__icon `div.panels > div.bg-brand-darker > div.layout-panel-minor > img.feature__icon`	/assets/icons/taxonomy-birds-1c9a25ad1ae27dbbafc3f7f29c0c...
div.panels > div.bg-brand-darker > div.layout-panel-minor > img.feature__icon `div.panels > div.bg-brand-darker > div.layout-panel-minor > img.feature__icon`	/assets/icons/taxonomy-amphibians-9031ab78070d1b80a7537ec...
div.panels > div.bg-brand-darker > div.layout-panel-minor > img.feature__icon `div.panels > div.bg-brand-darker > div.layout-panel-minor > img.feature__icon`	/assets/icons/taxonomy-sharks-8417182ca2e61aedc243ce946e1...
div.panels > div.bg-brand-darker > div.layout-panel-minor > img.feature__icon `div.panels > div.bg-brand-darker > div.layout-panel-minor > img.feature__icon`	/assets/icons/taxonomy-conifers-b142c401f7f4eb061949b323c...
div.panels > div.bg-brand-darker > div.layout-panel-minor > img.feature__icon `div.panels > div.bg-brand-darker > div.layout-panel-minor > img.feature__icon`	/assets/icons/taxonomy-corals-54eaf36b5294b95b361ce378f33...

More information about the performance of your application. These numbers don't directly affect the Performance score.

●Layout shift culprits

●Optimize DOM size

●Forced reflow

●LCP breakdown

●Modern HTTP

●Optimize viewport for mobile

●Minify CSS

●Minify JavaScript

●User Timing marks and measures 15 user timings

●Avoid long main-thread tasks 19 long tasks found

●Avoid non-composited animations 10 animated elements found

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 0 ms

●Server Backend Latencies 40 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Initial server response time was short Root document took 70 ms

○INP breakdown

○Avoid large layout shifts

Accessibility

These checks highlight opportunities to improve the accessibility of your web app. Automatic detection can only detect a subset of issues and does not guarantee the accessibility of your web app, so manual testing is also encouraged.

Internationalization and localization

If a page doesn't specify a `lang` attribute, a screen reader assumes that the page is in the default language that the user chose when setting up the screen reader. If the page isn't actually in the default language, then the screen reader might not announce the page's text correctly. Learn more about the `lang` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
html.js `html.js`

These are opportunities to improve the interpretation of your content by users in different locales.

Names and labels

Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more about the `alt` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div#page > div.layout-iconic-species-banner > a > img `div#page > div.layout-iconic-species-banner > a > img`
ul.list-partners > li.list-partners__item > a > img.partner `ul.list-partners > li.list-partners__item > a > img.partner`
ul.list-partners > li.list-partners__item > a > img.partner `ul.list-partners > li.list-partners__item > a > img.partner`
ul.list-partners > li.list-partners__item > a > img.partner `ul.list-partners > li.list-partners__item > a > img.partner`
ul.list-partners > li.list-partners__item > a > img.partner `ul.list-partners > li.list-partners__item > a > img.partner`
ul.list-partners > li.list-partners__item > a > img.partner `ul.list-partners > li.list-partners__item > a > img.partner`

Form elements without effective labels can create frustrating experiences for screen reader users. Learn more about the `select` element.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
English Japanese French Spanish `div.layout-account > div.layout-account__links > form.language-select-form > select#language-form__select`

Link text (and alternate text for images, when used as links) that is discernible, unique, and focusable improves the navigation experience for screen reader users. Learn how to make links accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
body.page-home > div#page > div.layout-iconic-species-banner > a `body.page-home > div#page > div.layout-iconic-species-banner > a`
section > ul.list-partners > li.list-partners__item > a `section > ul.list-partners > li.list-partners__item > a`
section > ul.list-partners > li.list-partners__item > a `section > ul.list-partners > li.list-partners__item > a`
section > ul.list-partners > li.list-partners__item > a `section > ul.list-partners > li.list-partners__item > a`
section > ul.list-partners > li.list-partners__item > a `section > ul.list-partners > li.list-partners__item > a`
section > ul.list-partners > li.list-partners__item > a `section > ul.list-partners > li.list-partners__item > a`

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

○Interactive controls are keyboard focusable

○Interactive elements indicate their purpose and state

○The page has a logical tab order

○Visual order on the page follows DOM order

○User focus is not accidentally trapped in a region

○The user's focus is directed to new content added to the page

○HTML5 landmark elements are used to improve navigation

○Offscreen content is hidden from assistive technology

○Custom controls have associated labels

○Custom controls have ARIA roles

●`[aria-hidden="true"]` is not present on the document `<body>`

●`[role]`s have all required `[aria-*]` attributes

●`[role]` values are valid

●Buttons have an accessible name

●Form elements have associated labels

●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.

●`[aria-hidden="true"]` elements do not contain focusable descendents

●Background and foreground colors have a sufficient contrast ratio

●Document has a `<title>` element

●Links are distinguishable without relying on color.

●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).

●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements

●Touch targets have sufficient size and spacing.

●Heading elements appear in a sequentially-descending order

●Document has a main landmark.

●Deprecated ARIA roles were not used

●Identical links have the same purpose.

○`[accesskey]` values are unique

○`[aria-*]` attributes match their roles

○`button`, `link`, and `menuitem` elements have accessible names

○ARIA attributes are used as specified for the element's role

○Elements with `role="dialog"` or `role="alertdialog"` have accessible names.

○ARIA input fields have accessible names

○ARIA `meter` elements have accessible names

○ARIA `progressbar` elements have accessible names

○Elements use only permitted ARIA attributes

○Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.

○`[role]`s are contained by their required parent element

○Elements with the `role=text` attribute do not have focusable descendents.

○ARIA toggle fields have accessible names

○ARIA `tooltip` elements have accessible names

○ARIA `treeitem` elements have accessible names

○`[aria-*]` attributes have valid values

○`[aria-*]` attributes are valid and not misspelled

○The page contains a heading, skip link, or landmark region

○`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.

○Definition list items are wrapped in `<dl>` elements

○ARIA IDs are unique

○No form fields have multiple labels

○`<frame>` or `<iframe>` elements have a title

○`<html>` element has a valid value for its `[lang]` attribute

○`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.

○Input buttons have discernible text.

○`<input type="image">` elements have `[alt]` text

○The document does not use `<meta http-equiv="refresh">`

○`<object>` elements have alternate text

○Skip links are focusable.

○No element has a `[tabindex]` value greater than 0

○Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.

○`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.

○`[lang]` attributes have a valid value

○`<video>` elements contain a `<track>` element with `[kind="captions"]`

○Tables have different content in the summary attribute and `<caption>`.

○All heading elements contain content.

○Uses ARIA roles only on compatible elements

○Image elements do not have `[alt]` attributes that are redundant text.

○Elements with visible text labels have matching accessible names.

○Tables use `<caption>` instead of cells with the `[colspan]` attribute to indicate a caption.

○`<td>` elements in a large `<table>` have one or more table headers.

Best Practices

General

Deprecated APIs will eventually be removed from the browser. Learn more about deprecated APIs.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Deprecation / Warning	Source
SharedStorage	www.iucnredlist.org/cdn-cgi/challenge-platform/scripts/jsd/main.js
StorageType.persistent is deprecated. Please use standardized navigator.storage instead.	www.iucnredlist.org/cdn-cgi/challenge-platform/scripts/jsd/main.js
Fledge	www.iucnredlist.org/cdn-cgi/challenge-platform/scripts/jsd/main.js

Source maps translate minified code to the original source code. This helps developers debug in production. In addition, Lighthouse is able to provide further insights. Consider deploying source maps to take advantage of these benefits. Learn more about source maps.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Map URL
nrl.iucnredlist.org/packs/redlist-91968a82c64c481f2989.js	nrl.iucnredlist.org/packs/redlist-91968a82c64c481f2989.js.map

●Uses HTTPS

●Avoids third-party cookies

●Allows users to paste into input fields

●Avoids requesting the geolocation permission on page load

●Avoids requesting the notification permission on page load

●Displays images with correct aspect ratio

●Serves images with appropriate resolution

●Page has the HTML doctype

●Properly defines charset

●No browser errors logged to the console

●No issues in the `Issues` panel in Chrome Devtools

●Ensure CSP is effective against XSS attacks

●Use a strong HSTS policy

●Ensure proper origin isolation with COOP

●Mitigate DOM-based XSS with Trusted Types

●Detected JavaScript libraries

○Redirects HTTP traffic to HTTPS

○Mitigate clickjacking with XFO or CSP

SEO

These checks ensure that your page is following basic search engine optimization advice. There are many additional factors Lighthouse does not score here that may affect your search ranking, including performance on Core Web Vitals. Learn more about Google Search Essentials.

Content Best Practices

Meta descriptions may be included in search results to concisely summarize page content. Learn more about the meta description.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more about the `alt` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div#page > div.layout-iconic-species-banner > a > img `div#page > div.layout-iconic-species-banner > a > img`
ul.list-partners > li.list-partners__item > a > img.partner `ul.list-partners > li.list-partners__item > a > img.partner`
ul.list-partners > li.list-partners__item > a > img.partner `ul.list-partners > li.list-partners__item > a > img.partner`
ul.list-partners > li.list-partners__item > a > img.partner `ul.list-partners > li.list-partners__item > a > img.partner`
ul.list-partners > li.list-partners__item > a > img.partner `ul.list-partners > li.list-partners__item > a > img.partner`
ul.list-partners > li.list-partners__item > a > img.partner `ul.list-partners > li.list-partners__item > a > img.partner`

Format your HTML in a way that enables crawlers to better understand your app’s content.

○Structured data is valid

●Page isn’t blocked from indexing

●Document has a `<title>` element

●Page has successful HTTP status code

●Links have descriptive text

●Links are crawlable

●robots.txt is valid

●Document has a valid `hreflang`

○Document has a valid `rel=canonical`