Search results
Species are classified into one of nine Red List Categories: Extinct, Extinct in the Wild, Critically Endangered, Endangered, Vulnerable, Near Threatened, Least Concern, Data Deficient and Not Evaluated. Vulnerable, Endangered and Critically Endangered species are considered to be threatened with extinction.
of the species in the group has been assessed) groups containing ≥150 species The IUCN Red List tells us which species are the most likely to go extinct, where these species occur, the threats causing the extinction pressure and the conservation actions needed. The Red List Index (RLI) of species survival for taxonomic groups that have been
- 8MB
- 24
People also ask
Are anaconda species taxonomic?
Are anacondas phylogenetic?
Where are anacondas found?
Is the northern green anaconda a separate species?
Feb 16, 2024 · genetic data from four recognized anaconda species across nine countries, this study investigates the phylogenetic relationships within the genus Eunectes . A key finding was the identification of
- A Dynamic Red List: Reasons For Changing Status
- Non-Genuine Reasons
- Genuine Reasons
- An Expanding Red List: Knowledge Gaps and Fully Assessed Groups
- How Many Species Are Threatened?
- Tables 1 & 2: Threatened Species in Past and Present IUCN Red Lists
- Tables 3 & 4: Summaries by Taxonomic Group
- Tables 5 & 6: Summaries by Country
- Table 7: Species Changing Red List Category
- Table 8: Endemic Species by Country
In order to monitor the changing status of biodiversity, it is essential to reassess species periodically. This reassessment may result in species moving into a different Red List Category for non-genuine or genuine reasons:
New information has become available since the last assessment (e.g., more recent data are available on population sizes, threatening processes, rates of decline or recovery, etc.).There has been a taxonomic revision resulting in the species no longer being the same concept as it was before (e.g., it is now split into several species each with smaller ranges, population sizes...An error has been discovered in the previous assessment (e.g., the wrong information was used; the IUCN Red List Categories and Criteria were applied incorrectly; etc.).The previous assessment used an older version of the IUCN Red List Categories and Criteria and the reassessment uses the current criteria which have slightly different thresholds.The main threats are no longer present, or conservation measures (e.g., reintroduction, habitat protection or restoration, legal protection, harvest management, etc.) have successfully improved the...The main threats have continued unabated, have increased, or new threats have developed causing the status of the species to deteriorate enough to move it into a higher category of threat.In addition to species changing status, The IUCN Red List grows larger with each update as newly described species and species from the less well-known groups are assessed for the first time (Figure 1). IUCN and its partners are working to expand the number of taxonomic groups that have full and complete Red List assessments in order to improve our...
Species assessed as Critically Endangered (CR), Endangered (EN), or Vulnerable (VU) are referred to as "threatened" species. However, Extinct in the Wild (EW) species can move into the threatened categories following successful reintroduction. Therefore, EW species should be included when reporting proportions of threatened species. Reporting the p...
Tables 1 and 2 are organized by taxonomic group and show numbers of threatened species listed in the current version of The IUCN Red List in relation to the estimated number of described species (Table 1a), and numbers of threatened species in each version of The IUCN Red List since 1996 (Tables 1b and 2). These tables highlight the disparity betwe...
Tables 3 and 4 are organized by taxonomic group. These should be used to see, for example, the numbers of globally threatened mammals, birds and amphibians (Table 4 is an expanded version of Table 3). These tables include number of species tagged as 'Possibly Extinct' (CR(PE)) and 'Possibly Extinct in the Wild' (CR(PEW)). These figures are included...
Tables 5 and 6 are organized by country. These should be used to see, for example, number of globally threatened mammals or the numbers of Critically Endangered species occurring within a specific country. The figures presented in Tables 5 and 6 include only certain distributions, reintroduced species and regionally extinct species (i.e., the figur...
Table 7 is organized by taxonomic group. This table should be used to check which species have changed Red List status since the previous Red List update and the main reason for the status change. Table 7 is provided here for the current Red List and for previous Red Lists (dating back to 2007). Important Note: Table 7 is provided only to summarize...
Table 8 is similar to the country tables (Tables 5 and 6), but focus on endemic species only (i.e., species occurring naturally within one country only). This table only presents figures for the comprehensively assessed species groups (i.e., where >80% of the species in the group have been assessed). Note that the Advanced Searchpage includes a fil...
Feb 16, 2024 · species are smaller than E. murinus and are distributed within or adjacent to the distribution of E. murinus. The recently described species Eunectes beniensis, or Beni Anaconda, has a distribution restricted to the Beni region of Bolivia [25,26]. Eunectes deschauenseei, or Dark Spotted Anaconda, is distributed in the northeast of the continent ...
Jul 9, 2021 · PDF | On Jul 9, 2021, Fernanda Pozzan Paim and others published THE IUCN RED LIST OF THREATENED SPECIES™ | Find, read and cite all the research you need on ResearchGate.
Jul 30, 2019 · Editor’s note, May 20, 2021: Since this story published in 2019, two species have recovered and have been taken off the endangered species list: the least tern (shown here in Missouri) and the ...
