Required Supporting Information - All Assessments

The table below outlines the required supporting information for all assessments submitted to The IUCN Red List (in all conditions). Any assessments that do not include all of the information listed in this table will be returned to Assessors.

Table 1: Required supporting information under all conditions

The guidance notes provided in this table often refer to the IUCN Species Information Service (SIS) as this is the central database used by Assessors within the IUCN SSC Specialist Group, Red List Authority, and  Red List Partner networks.

Required Information
Purpose Guidance Notes
1. Scientific name1

(a) To identify which taxon is being assessed

(b) To support IUCN Red List website functionality
If the taxon is already in SIS, this information requires no additional effort from the Assessors. If the taxon is not yet recorded in SIS, Assessors must provide this information to the Red List Unit.
2. Higher taxonomy details (Kingdom, Phylum, Class, Order, Family)

(a) To identify which taxon is being assessed

(b) To support IUCN Red List website functionality
If the taxon is already in SIS, this information requires no additional effort from the Assessors. If the taxon is not yet recorded in SIS, Assessors must provide this information to the Red List Unit.
3. Taxonomic authorities for all specific and infra-specific names used, following the appropriate nomenclatural rules2 To identify which taxon is being assessed If the taxon is already in SIS, this information requires no additional effort from the Assessors. If the taxon is not yet recorded in SIS, Assessors must provide this information to the Red List Unit.
4. IUCN Red List Category and Criteria (including sub-criteria) met at the highest category of threat

(a) To identify the current status of the taxon

(b) To support IUCN Red List website functionality

(c) To allow basic analyses

The IUCN Red List Category and Criteria represent the most fundamental elements of an IUCN Red List assessment.

Application of the categories and criteria must be in accordance with the IUCN Red List Categories and Criteria. Version 3.1 and the current version of the Guidelines for Using the IUCN Red List categories and Criteria. Both of these documents can be downloaded from the Key Documents page.

5. A rationale for the IUCN Red List assessment To justify the IUCN Red List Category and Criteria selected Include any inferences or uncertainty that relate to the interpretation of the data and information in relation to the criteria and their thresholds.
6. Data for parameters triggering the IUCN Red List Criteria met at the highest category level To underpin and justify the IUCN Red List Category and Criteria used

Enter these data either into the relevant coded/numerical fields or in the relevant narrative (text) fields in SIS.

If data are entered into the data fields, this allows teh Red List Criteria calculator to be used in SIS, which automatically checks for errors, omissions and inconsistencies, reducing the burden of manual checking by Assessors, RLA Coordinators and project coordinators.

If data are included within the narrative (text) fields, the text must clearly indicate all of the relevant subcriteria, parameters and qualifiers (observed, estimated, projected, inferred, or suspected) used.

7. Countries of occurrence (for native and reintroduced taxa), including Presence and Origin coding

(a) To support IUCN Red List website functionality (especially country searches)

(b) To allow basic analyses

By default, SIS automatically records Presence = Extant and Origin = Native as countries are selected.

A tool will be made available to determine countries of occurrence automatically from GIS maps.

Countries of occurrence are not strictly required for vagrant and introduced ranges.

8. Geo-referenced distribution data for all taxa with a known distribution

(a) To support IUCN Red List website functionality

(b) To allow basic analyses

(c) Spatial distribution data are essential for supporting assessments under criteria B and D2 (and arguable also for demonstrating that these thresholds are not met)

Spatial distribution data are not required for taxa of unknown provenance (e.g., taxa assessed as Data Deficient because their range is not known).

Spatial data may be geo-referenced polygons or point localities, and may be provided in any format, including as a paper map, text file of coordinates, pdf, graphics file, or GIS shapefile.

A GIS shapefile is preferred (but is not strictly required), given their value for conducting spatial analyses, and visual displays and future funtionality on The IUCN Red List website.

Although additional distributional documentation is desireable for taxa qualifying under criterion B (e.g., 2x2 km grids showing occupancy), this is not required.

Note that any distributional data can be coded as sensitive to avoid this being distributed or displayed on The IUCN Red List website.

9. Direction of current population trend (stable, increasing, decreasing, unknown)

(a) To support IUCN Red List website functionality

(b) To allow basic analyses

 
10. Coding for occurrence in freshwater (=inland waters), terrestrial, and marine ecosystems

(a) To support IUCN Red List website functionality

(b) To allow basic analyses

 In SIS this is the "system" field.
11. Suitable habitats utilized (coded to the lowest level in the Habitats Classification Scheme)

(a) To support the assessment

(b) To support IUCN Red List website functionality

(c) To allow basic analyses

To speed up entering such coding in SIS, habitat importance isset to 'suitable' by default for any habitat selected.
12. Bibliography (cited in full; including unpublished data sources, but not personal communications) To underpin the assessment and provide all sources of data and information used to support the IUCN Red List assessment In SIS, references are recorded in the Reference Manager.
13. Names and contact details of the Assessor(s) and Reviewer(s). At least one Reviewer is required.

(a) To demonstrate that the appropriate assessment and review process has been undertaken

(b) To acknowledge those involved in the assessment

(c) To allow Assessors and Reviewers to be contacted easily in the case of an assessment being questioned

Note that Contributor(s), Compiler(s), and Facilitator(s) may also be recorded but are not strictly required. However, recording them in an assessment does allow these people to be acknowledged on The IUCN Red List website.

All contact details are stored by IUCN; only names (e.g., surname and initials) are displayed on The IUCN Red list website.

More than one Reviewer is encouraged for threatened species, commercially significant species, or those species for which assessments may be contentious.

Notes

1. All taxa must be validly published in accordance with the appropriate international nomenclatural codes and shoudl be currently accepted names. Standard taxonomic checklists should be used wherever possible for names. For the standard lists currently adopted by IUCN see Information Sources and Quality page. For many groups no standards are available, or there may be a valid reason for adopting another treatment. In such cases, the taxonomic treatment followed should be indicated and if not one of the standards followed by IUCN, the reference should be cited in full and a reason for the deviation given.

2. This should incllude the date of publication, except in the case of plant names. The abbreviations used for author names for plants shoudl follow Brummitt and Powell (1992) and subsequent updates on the International Plant Names Index website.