Global and Regional IUCN Red List Assessments: 4

red - an R package to facilitate species red list assessments according to the IUCN criteria

The International Union for the Conservation of Nature Red List is the most useful database of species that are at risk of extinction worldwide, as it relies on a number of objective criteria and is now widely adopted. The R package red - IUCN Redlisting Tools - performs a number of spatial analyses based on either observed occurrences or estimated ranges. Functions include calculating Extent o...

Biotelemetry and biologging in endangered species research and animal conservation: relevance to regional, national, and IUCN Red List threat assessments

The current biodiversity crisis is characterized by the decline and extinction of numerous animal populations and species world-wide. To aid in understanding the threats and causes of population decline and the assessment of endangerment status of a species, conservation scientists and practitioners are increasingly relying on remote assessments using biotelemetry (radio telemetry, acoustic tel...

The Iucn Red List of Threatened Speciestm

Polar Bears (Ursus maritimus) are facing a range of threats that might impact their future population status (see section Threats below). The IUCN Polar Bear Specialist Group (PBSG) regards loss of sea-ice habitat due to climate warming as the most serious threat to future Polar Bear survival. We therefore based our Red List assessment on this threat factor only, recognizing that sea-ice condit...

Ambiguity in guideline definitions introduces assessor bias and influences consistency in IUCN Red List status assessments

1 College of Natural Sciences, Bangor University, Bangor, UK, 2 Centre for African Conservation Ecology, Nelson Mandela Metropolitan University, Port Elizabeth, South Africa, 3 Department of Animal and Wildlife Sciences, Centre for Wildlife Management, University of Pretoria, Pretoria, South Africa, 4 Endangered Wildlife Trust, Johannesburg, South Africa, 5 Panthera, New York, NY, USA, 6 Depart...

Guidelines for Application of Iucn Red List Criteria at Regional and National Levels