what does iucn stand for?
International Union for Conservation of Nature
IUCN Red List
The International Union for Conservation of Nature (IUCN) Red List of Threatened Species
what is a ruff? Medium-sized wading bird. where is it found? Marshes and wet meadows across northern Eurasia. what does it eat? Beetles, flies, crustaceans, spiders, etc. do they have a relationship with humans? Yes, formerly trapped for food in England. are there any efforts being made to conserve them? No, classified as "least concern". what do you mean classified as "least concern"? is there a list for this? It didn't approach the thresholds for the population decline criterion of the IUCN Red List.
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IUCN Red List [SEP] Introduction
The International Union for Conservation of Nature (IUCN) Red List of Threatened Species (also known as the IUCN Red List or Red Data List), founded in 1964, is the world's most comprehensive inventory of the global conservation status of biological species. It uses a set of criteria to evaluate the extinction risk of thousands of species and subspecies. These criteria are relevant to all species and all regions of the world. With its strong scientific base, the IUCN Red List is recognized as the most authoritative guide to the status of biological diversity. A series of Regional Red Lists are produced by countries or organizations, which assess the risk of extinction to species within a political management unit.