How many kinds of red birds are there?

How many species have changed their IUCN Red List categories?

77 species have changed their IUCN Red List categories. Many of these are a result of an improved knowledge of populations or threats but of the 12 species that changed category owing to changes in their population size, rate of decline or range size, eight were uplisted to a higher level of threat.

What do the different bird lists mean?

Each species is added to a list – red, amber and green – depending on different factors including population levels, number of breeding birds and global threats. Birds on the red list are at the highest risk, while birds on the green list are at the least risk.

How many species have been assessed for the Red List?

The number of species which have been assessed for the Red List has been increasing over time. As of 2019, of 105,000 species surveyed, 28,338 are considered at risk of extinction because of human activity, in particular overfishing, hunting and land development.

How many species have been assessed for the IUCN Red List?

Increase in the number of species assessed for The IUCN Red List of Threatened Species ™ [blue line: 2000-2021 (version 2021-3)] and number of species still to assess to reach the 160,000 target (red dotted line).

What are the different categories of the Red List?

The Red List categories range from Least Concern through Near Threatened, Vulnerable, Endangered and Critically Endangered to Extinct in the Wild and Extinct ( IUCN, 2001 ).

What are the IUCN Red List threat categories?

In descending order of threat, the IUCN Red List threat categories are as follows: Critically Endangered, Endangered and Vulnerable: species threatened with global extinction. Near Threatened: species close to the threatened thresholds or that would be threatened without ongoing conservation measures.

What is the difference between the iucn2 and the bocc5?

The results of this second IUCN assessment (IUCN2) are provided in the same paper as BOCC5. The BOCC assessment is based on the most up-to-date evidence available.

What is the 2007 IUCN Red List of Threatened Species?

On 12 September 2007, the World Conservation Union (IUCN) released the 2007 IUCN Red List of Threatened Species. In this release, they have raised their classification of both the western lowland gorilla ( Gorilla gorilla gorilla) and the Cross River gorilla ( Gorilla gorilla diehli) from endangered to critically endangered,…

How many species are on the UK Red List?

• The UK Red List for birds now stands at 70 species, a net increase of three from the last update in 2015. • Swift, House Martin, Greenfinch and Bewick’s Swan added to the UK Red List, a growing list of birds that are under threat. • The length of the UK Red List has almost doubled, from 36 to 70 species, in the last 25 years.

What does the Red List mean for the UK’s birds?

One of the UK’s favourite birds, the greenfinch, has been moved to the red list meaning urgent action is needed to prevent extinction in the UK More than a quarter of birds are under threat of extinction in the UK, a new report has shown. Seventy of the UK’s 245 species have been added to a red list by conservationists.

What is a Red List taxon?

A taxon is a group of one or more populations of a species or organism that form a unit. What is the Red List? The International Union for the Conservation of Nature is perhaps best known for creating the IUCN Red List of Threatened Species, a detailed accounting of the world’s vulnerable and endangered species.

What is the IUCN Red List Index for birds?

The IUCN Red List data is used to inform the development of national, regional and sub-national legislation on threatened species protection, and also the development of national biodiversity The Red List Index for the world’s birds shows that their overall status deteriorated steadily during 1988-2008.

What questions can the IUCN Red List help answer?

The IUCN Red List can help answer many important questions including: • What is the overall status of biodiversity, and how is it changing over time? • How does the status of biodiversity vary between regions, countries and sub-national areas? • What is the rate at which biodiversity is being lost? • Where is biodiversity being lost most rapidl…

What is the International Union for the conservation of Nature (IUCN)?

IUCN has observer and consultative status at the United Nations and plays a role in the implementation of several international conventions on nature conservation and biodiversity. It was involved in establishing the World Wide Fund for Nature and the World Conservation Monitoring Centre.

What is IUCN best known for?

IUCN’s best known publication, the Red Data Book on the conservation status of species, was first published in 1964. IUCN began to play a part in the development of international treaties and conventions, starting with the African Convention on the Conservation of Nature and Natural Resources.

How many species were on the Red List in 2006?

The 2006 Red List, released on 4 May 2006 evaluated 40,168 species as a whole, plus an additional 2,160 subspecies, varieties, aquatic stocks, and subpopulations . On 12 September 2007, the World Conservation Union (IUCN) released the 2007 IUCN Red List of Threatened Species.

How does the IUCN assessment process work?

The IUCN assessment process uses the same underlying data on population trends and population size but the time periods over which change is assessed differs and is linked to generation length and also population size.

How are species classified?

Species are classified by the IUCN Red List into nine groups, specified through criteria such as rate of decline, population size, area of geographic distribution, and degree of population and distribution fragmentation.

What does the IUCN Red List Index measure?

PURPOSE The IUCN Red List Index (RLI) measures trends in the overall extinction risk (‘conservation status’) of sets of species, as an indicator of trends in the status of biodiversity.

What is the Red List Index (RLI)?

The Red List Index (RLI) shows trends in overall extinction risk for species, and is used by governments to track their progress towards targets for reducing biodiversity loss. Most species that move between categories on The IUCN Red List (see the section Reasons for Changing Category) do so because of improved knowledge or revised taxonomy.

What is the IUCN IMMAs?

Three Important Marine Mammal Areas (IMMAs) awarded for the Endangered Caspian Seal ( Pusa caspica) announced as part of a tranche of 14 new IMMAs for the marine mammals of the Black Sea, Turkish Straits and Caspian Sea. What is The IUCN Red List?

How many species are on the Red List of Threatened Species™?

The IUCN Red List of Threatened Species ™ contains global assessments for almost 134,400 species. More than 82% of these (>111,000 species) have spatial data. The spatial data provided below are mostly for comprehensively assessed taxonomic groups and selected freshwater groups.

Who funded the IUCN Quizlet?

An international effort, governments, corporations, and foundations collectively funded the IUCN. Originally headquartered in Fontainebleau, France, it now calls Gland, Switzerland home base. The United Nations Educational, Scientific, and Cultural Organization (UNESCO) chartered the IUCN.

What does IUCN do for the environment?

It is involved in data gathering and analysis, research, field projects, advocacy and education. IUCN’s mission is to “influence, encourage and assist societies throughout the world to conserve nature and to ensure that any use of natural resources is equitable and ecologically sustainable”.

What is IUCN 1 science?

1 Science – the IUCN Red List of Threatened Species™. 2 Action – hundreds of conservation projects all over the world. 3 Influence – through the collective strength of more than 1,200 government and non-governmental Member organizations.