Guidelines & Brochures — Global

What's New Archive

Along with pages being regularly updated to reflect the new data available in each Red List update, new pages, tools and functionality are added to The IUCN Red List website at any time throughout the year.


The "new" IUCN Red List website was launched in November 2018, strengthening the ability of the website to provide data and information on the species included on the Red List.

Over the next two years, new pages and tools were added to the website, but with little announcement of these by IUCN. In 2020, the introduction of the "What's New" page changed this and now allows Red List users to quickly see what new developments have happened on the website.

The most recent updates and additions to the website are listed in the current What's New page. All updates and additions since the start of 2020 are listed below.

New functionality

Interactive Statistics tables Search filters: Green Status assessments
Search filters: Country Legends Search filters: Needs Updating
Search filters: CR(PE) and CR(PEW) Search filters: Red List Indices
Search filters: Endemics Search results: Green Status codes

New and updated pages

Assessment page: Abstracts IUCN Green Status of Species
Assessment page: Citation copy tool Online Green Status training
Assessment page: Green Status assessments Red List Index (RLI)
Assessment page: Text Overview Red List Webinars
Assessment page: Threat scores SIS News and Updates
Assessment page: Other changes Spatial Data Download
Frequently Asked Questions (FAQs) Summary Statistics
Green Status Supplementary Information Supporting Information

New and updated tools and files

Green Status of Species Guidelines and tools Species Richness and Range Map Rarity data
Extinction Risk Assessment Tools Range Map Image Files

Non-English language translations

Pages available in Spanish Red List Guidelines
Extinction Risk Assessment Tools  


Indigenous & Local Knowledge Guidelines

Scientfic papers

IUCN Red List 2017-2020 Report

Guidelines for Appropriate Uses of Red List Data



Interactive Statistics Tables

In 2020, the Red List website introduced automated and interactive tables for some of the summary statistics that previously were only available as PDF documents, starting with the tables for summaries by taxonomic group (tables 3 and 4) and summaries by country (tables 5 and 6). These tables are still available to download as PDF documents, but now they are also available as CSV files. The figures in the tables also include links to the search results page, showing lists of the species these figures refer to. The tables are available in full, or you can decide to view just one section of the table (e.g., fungi only, or species in South America only).

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Search filters: Country Legends

In 2020, a Country Legends search filter was added to the Advanced Search. This allows the data to be filtered based on country codes for presence (extant, possibly extant, possibly extinct, extinct post-1500, presence uncertain) and origin (native, reintroduced, introduced, vagrant, origin uncertain, assisted colonisation). The Country Legends filter appears beneath the Land Regions filter in the Advanced Search.

By combining selections in the Land Regions and the Country Legends search filters, search results can be tailored to, for example, find a list of species occurring in a particular country, excluding introduced and vagrant species and species with uncertain occurrence in that country.

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Search filters: CR(PE) and CR(PEW)

In 2020, new functionality was introduced to the Advanced Search to allow users to filter the data to show only Critically Endangered taxa that are flagged as Possibly Extinct [CR(PE)] or Possibly Extinct in the Wild [CR(PEW)]. To see these taxa, scroll down the Advanced Search page to the ‘INCLUDE’ section, then use the checkboxes next to ‘CR – Possibly Extinct’ and ‘CR – Possibly Extinct in the Wild’. To see the list of species only, make sure the Species checkbox in the 'INCLUDE' section is ticked; to see the list of subspecies and varieties only, make sure the Subspecies and varieties checkbox is ticked.

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Search filters: Endemics

In 2020, a search filter was added to allow users to find lists of country endemics (i.e., taxa that are recorded as being native to one country only). First, use the Land Regions filter in the Advanced Search page to find the list of taxa occurring in a specific country. The example below shows a search for all species occurring in Cambodia.

Next, scroll down the page to the INCLUDE checkboxes and tick Endemic. In the example, the list of species reduces to 30 endemic species in Cambodia.

Note: the endemics filter does not work for regional searches. For example, using the endemics filter on the search results for all species occurring in Europe will not result in a list of all species endemic to Europe, as many of the European endemic species will occur in more than one country within Europe.

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Search filters: Green Status assessments

The 2021-3 Red List introduced the first Green Status assessments to the IUCN Red List website. Website users can now filter their search results to find species with Green Status assessments. On the Advanced Search page, scroll down to the "FILTER ON" section to see this filter.

In 2022, eleven new Green Status assessments were added to the Red List website, bringing the total to 37.


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Search results: Green Status assessments

For all species with a Green Status assessment, the search results page displays the Green Status alongside the Red List status. The two-letter abbreviations for Green Status assessments refer to species recovery categories: Indeterminate (ID); Non-Depleted (ND); Fully Recoverd (FR); Slightly Depleted (SD); Moderately Depleted (MD); Largely Depleted (LD); Critically Depleted (CD); Extinct in the Wild (W); and Extinct (EX). For detailed guidelines and Gren Status assessment tools, see here.

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Search filters: Needs Updating

IUCN recommends that all Red List assessments be updated at least once every 10 years (ideally every 4-5 years). However, with limited funding and capacity for red listing, this is not always possible. The IUCN Red List therefore includes some assessments that are now more than 10 years old and need to be updated. These are retained on the Red List because they are the most recent extinction risk assessments available for these taxa. In 2020, a filter was added to the Advanced Search to allow users to easily see all assessments that need to be updated.

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Search filters: Red List Indices

In 2020, the Red List Indices (RLIs) became available on The IUCN Red List website in the Advanced Search. To search for a Red List Index, select the "Red List Indices" option.

The RLIs are arranged in different subsets: global, regional and subregional, thematic, and Sustainable Development Goals (SDGs). Within each subset, the RLIs are disaggregated to show trends within specific groups (e.g., freshwater species only, species in Brazil, African species, etc.).

For more information about the Red List Indices, see the Red List Index page.

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Assessment page: Abstracts

In the 2021-3 Red List, a short abstract was added to the assessment page, allowing Red List assessments to be more easily found by online academic search engines.

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Assessment page: Citation Copy Tool

The assessment page now includes a one-click copy tool for assessment citations. Click on the copy icon to the right of the citation to copy.


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Assessment page: Green Status of Species assessments

The 2021-3 update included the first Green Status of Species (GSS) assessments for 26 species, marking a major step forward for the IUCN Red List. Now Red List users can easily see the current risk of extinction (Red List status) and the chances of recovery (Green Status) for species, where these assessments have been carried out.

Note that the Red List assessment and the Green Status assessments have separate citations. These citations appear above the teardrop category image for each assessment. Information icons are also in place to explain the purpose of these different assessments: to see the information panl, place your cursor on the "i" icon next to "THE RED LIST ASSESSMENT" and  "THE GREEN STATUS ASSESSMENT" text.

For species with Green Status assessments, information relating to these assessments is displayed throughout the assessment page, highlighted by green text.

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Assessment page: Text Overview

In the 2021-3 Red List update, the text summary was removed from the end of the assessment page. This was replaced by a text overview panel, separate from the main assessment, which users can scroll down through to read all the assessment text. To open this panel, click on the Text Overview button.





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Assessment page: Threat scores

Prior to Red List version 2022-2, IUCN used a scoring scheme to quantify the impact of threats coded for species, based on the timing, scope and severity of these threats. Threat scores were presented in the Threats section in the assessments. However, IUCN now recognises the underdeveloped scientific basis for these impact scores. From version 2022-2, IUCN temporarily removed the threat scores from assessments, while the technical basis for assigning threats and calculating threat impact scores is under review. For more information, see the Threat Classification Scheme page.

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Assessment page: Other changes

In addition to introducing the Green Status assessments, abstracts and the text overview panel, the 2021-3 Red List brought in a range of other changes to the assessment page, including:

  • A hyperlink to the assessment details at the top of the page, next to the link back to the search results.

  • For species with Green Status assessments, the scale bar that shows which category the species is listed under in relation to the other available categories was moved from the top of the assessment page to the Assessment Details section to accommodate the additional Green Status information in the assessment. A new scale bar was also introduced to display the Green Status categories.

Assessments for species that do not have a Green Status assessment still display the Red LIst scale bar at th top of the assessment page.

  • The assessment summary information was reduced by removing the summary of habitats, threats and conservation actions codes. These codes are provided in the detailed assessment. Removing these from the summary informaiton section shortened the length of the assessment paages, making them easier to read through.

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Indigenous & Local Knowledge (ILK) Guidelines

Building on discussions over at least the last decade between the IUCN CEESP-SSC Sustainable Use and Livelihoods Specialist Group and the IUCN SSC Red List Committee, with insights gained from the IPBES Indigenous & Local Knowledge (ILK) Approach, IUCN released the guidance document Application of Indigenous & Local Knowledge (ILK) in IUCN Red List assessments. This document aims to examine all the issues and general principles surrounding the application of indigenous and local knowledge (ILK) in the IUCN Red List of Threatened Species and to outline some key steps to enhance this application in Red List assessments. This document was added to the Red List website in 2022, and is available to download (in English, French and Spanish) from here.

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IUCN Green Status of Species page

The Green Status of Species assesses the recovery of species’ populations and measures conservation success. In 2020, new pages were added to the website providing more information about the Green Status of Species: IUCN Green Status of Species and Measuring Recovery with the IUCN Green Status of Species. The Green Status of Species Guidelines and Assessment Materials page was also added to the Resources section, allowing users to download guidelines and tools.

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Green Status Supplementary Information page

Green Status of Species (GSS) assessments have supplementary information documents attached to them. In the 2021-3 Red List, development was still underway to make this information available via the "Download" button in the assessment. Until the Download button could include these documents, they are available on a temporary page: Green Status Supplementary Information.

Currently, the GSS supplementary information documents include graphs showing the Green Scores for the assessed species; the list of past, current and planned future conservation actions; and the list of past, current and expected future threats across the species' range.

The assessment page includes a link to the temporary supplementary information page; to go directly to the Green Status Supplementary Information page, click here.

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Online Green Status training course

The online IUCN Red List Assessor training course for has been available since 2013. In 2022, a new online course for the IUCN Green Status of Species was released, developed in partnership with Re:wild, University of Oxford and the Zoological Society of London. The Green Status of Species training course is available on the TNC's ConservationTraining website, alongside the Red List Assessor training course. A link to the new course is now included in the Online Red List and Green Status Training page.

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Frequently Asked Questions page

The IUCN Red List Unit receives thousands of emails each year, often from people asking about how Red List data can be used, the assessment process, how to use the website, and how people can help species. The Frequently Asked Questions (FAQ) page was added to the website in 2020 to provide answers to many of these questions.

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Supporting Information page

The IUCN Red List is more than just a list of species names and Red List Categories. It is a compendium of information detailing the current extinction risk for the animal, fungus and plant species that have been assessed to date. In 2020, the Supporting Information page was added to provide a comprehensive overview of all the information that is included in the online Red List assessment Fact Sheets.


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Red List Index page

In addition to the Red List Indices being added to the website, the Red List Index (RLI) page was also updated in 2020 to provide more information about what the RLI tells us about the state of biodiversity, how RLIs are used, links to more RLI publications, and guidance on calculating RLIs.



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SIS News and Updates

The Species Information Service (SIS) is the data management system used by the IUCN Red List to allow assessors from around the world to access, edit and submit assessments for publication on the Red List website. The SIS News and Updates page is updated regularly as new data fields are added and new tools and functionality are brought into SIS.

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Summary Statistics page

In 2020, links were added to the Summary Statistics page to direct users to the automated statistics page for summaries by taxonomic group (tables 3 and 4) and summaries by country (tables 5 and 6). Note that from the 2022-1 Red List onwards, the calculation for proportion of threatened species now includes threatened (CR, EN and VU) AND Extinct in the Wild (EW) species.

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Spatial Data Download page

Prior to 2020, the Spatial Data Download page only allowed polygon spatial data downloads. In 2020, bulk downloads of point data were added to this page, where these data are available (mostly for plant groups, but also for some invertebrate groups).

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Red List Guidelines

In 2022, some minor text corrections were addressed in The Guidelines for Using the IUCN Red List Categories and Criteria, updating it to version 15.1 (July 2022). Version 15.1 is also now available in Portuguese. Version 15.1 of the Red List Guidelines can be downloaded from here.





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Guidelines for Appropriate Uses of Red List Data

In July 2022, the Guidelines for Appropriate Uses of Red List Data were updated to version 4.0. Changes to this document include:

  • Annex 1: for reporting purposes, the revised formulas for proportion of threatened species now include Extinct in the Wild (EW) species with Critically Endangered (CR), Endangered (EN) and Vulnerable (VU) species.
  • Annexes 2 and 3: hyperlinks to additional resources have been updated.
  • Annex 4: this new Annex provides Guidelines for the Appropriate Use of IUCN Red List data in Harvesting of Threatened Species.


The updated guidelines and the annexes are available here.

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Extinction Risk Assessment tools


The most recent update of the Guidelines for Using the IUCN Red List Categories and Criteria (version 14) included reference to two models (a Threats model and a Records and Surveys model) that help Assessors determine the probability of a species now being Extinct or Extinct in the Wild. In 2020, the Extinction Risk Assessment tools page was added to give users access to both of these extinction probability models. In 2021, these tools were also made available in French and Spanish.

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Range Map Image files

All assessment Fact Sheets on the Red List website include a Download tool, where a range of files are available (e.g., the PDF version of the assessment, any supplementary information, spatial data, etc.). In 2020, it was made possible for users to use thus tool to download a JPG image file of the range map.

Click on the link to open the image file. To save the image file, right-click on the image and select "Save Image As...".

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IUCN Red List Webinars

In 2022, the IUCN Red List, in collaboration with ABQ Biopark, initiated a series of webinars about the IUCN Red List. The new IUCN Red List webinars page makes these recorded webinars freely available to everyone. This page now includes all three Red List webinars from 2022, focusing on the Red List Criteria, preparing distribution maps, and using the Species Information Service (SIS). It also includes links to a series of webinars specifically about national Red Lists, which compliment the IUCN Red List webinars.

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Species Richness and Range Rarity data

In 2020, rasters and image files for species richness and range-size rarity were made available to download from the Species Richness and Range Rarity Data page in the Resources and Publications section. These are based on the raw IUCN ranges (version 2017-3) for amphibians, birds and mammals.

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Pages available in Spanish

The IUCN Red List website has the option to change the language setting from English to French, Spanish or Japanese (see the top right corner of the website). We do not yet have complete translations for all pages on the website, but we are gradually adding translated versions as they become available.

In 2020, the following pages were made available in Spanish:

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IUCN Red List 2017-2020 Report

In 2021, the 2017-2020 IUCN Red List quadrennial report was made available on the Red List website. This report captures the highlights of the conservation impact of The IUCN Red List of Threatened Species over the 2017–2020 quadrennial. It represents the collective efforts of the IUCN Red List Partnership and reports against the ten target Results of the IUCN Red List Strategic Plan (2017-2020). To download this report, go to the Resources and Publications section on the website.




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Scientific papers

The IUCN Red List of Threatened Species often inspires scientific research and comments. As new papers are published, the Red List website adds links to those papers and journals to help Red List users to find the most current and relevant analyses and information available. Explore the recently published papers in the Scientific Papers section in Resources and Publications.



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