International Union for Conservation of Nature

American  

[in-ter-nash-uh-nl yoon-yuhn fer kon-ser-vey-shuhn uhv ney-cher] / ˌɪn tərˈnæʃ ə nl ˈyun yən fər ˌkɒn sərˈveɪ ʃən əv ˈneɪ tʃər /

noun

1. an international organization dedicated to research and analysis in the field of nature conservation: known as the world’s leading authority on the conservation status of plant and animal species and for its compilation of the IUCN Red List. IUCN

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Etymology

Origin of International Union for Conservation of Nature

First recorded in 1945–50

Example Sentences

Forty-four percent of the world's coral species face extinction, mainly due to climate change, the International Union for Conservation of Nature estimated in 2024.

From Barron's • May 7, 2026

All slow loris species are listed by the International Union for Conservation of Nature as Critically Endangered, Endangered, or Vulnerable.

From Science Daily • Mar. 3, 2026

Today there are 415,000, according to the International Union for Conservation of Nature.

From The Wall Street Journal • Jan. 30, 2026

Atlantic salmon in Great Britain were listed as an endangered species by the International Union for Conservation of Nature when they were last assessed in 2022.

From BBC • Nov. 13, 2025

Chimpanzees are classified as endangered by the International Union for Conservation of Nature.

From Los Angeles Times • Sep. 26, 2025