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The greater roadrunner is about 52–62 cm (20–24 in) long, has a 43–61 cm (17–24 in) wingspan and weighs 221–538 g (7.8–19.0 oz). It stands around 25–30 cm (9 + 3 ⁄ 4 – 11 + 3 ⁄ 4 in) tall and is the largest cuckoo of the Americas. [13] [14] [15] The upper body is mostly brown with black streaks and sometimes pink spots. The ...
A Regional Red List may be created by any country or organisation by following the clear, repeatable protocol. The process is as follows: All information relevant to a species conservation status is collected, including species distribution, population trend information, habitat, ecology and life history information, threats to the species and conservation measures currently in place.
The Red List Index (sampled approach) (SRLI) has been developed in order to determine the threat status and also trends of lesser-known and less charismatic species groups. It is a collaboration between IUCN members and is coordinated through the Institute of Zoology (IoZ), the research division of the Zoological Society of London (ZSL).
The IUCN Red List of Ecosystems (RLE) is a global framework for monitoring and documenting the status of ecosystems. It was developed by the International Union for Conservation of Nature for biodiversity risk assessment. Its main objectives are to support conservation, resource use, and management decisions by evaluating all the world's ...
The ICUN compiled the “Red List”, evaluating the global conservation status of species based on the threat level. [15] The list separates species into threat levels ranging from least concern to extinct, aiding in directing efforts to mitigate species decline [16] This assessment evaluated factors contributing to species extinction like population size, trends, distributions, and threats.
The IUCN Red List of Threatened Species by the International Union for Conservation of Nature is the best known worldwide conservation status listing and ranking system. . Species are classified by the IUCN Red List into nine groups set through criteria such as rate of decline, population size, area of geographic distribution, and degree of population and distribution fragmenta
Lower Risk (LR) was a catch-all category which includes common species as well as those for which there may be conservation concern, but which do not warrant a higher category. This category was removed in the IUCN 3.x criteria, promoting its subcategories to full categories.
In the case of the Conservation Dependence and Conservation Gain metrics, "false negative" values have been attributed to use of a static Green Score baseline that does not indicate whether the species is projected to decline or recover if threats to a species change in the short term. [3] Version 2.0 of the Green Status of Species assessment ...