See the Birds We’ve Lost to Extinction—and Those on the Brink

Tierr@_de_N@die: Some of these birds are already extinct, others are critically endangered. The Anthropocene arrives to trigger the 6th Mass Extinction...

Found on all seven continents, birds are a vital gauge of ecosystem health. Yet many species have had it rough since at least 1500, when recordkeeping began. During the rise of global trade in the colonial era, birds in the biodiverse tropics, for example, were hard hit by habitat loss and the introduction of invasive species—threats that persist today. Nearly 200 species are gone forever, according to BirdLife International, the official authority for birds on the International Union for Conservation of Nature (IUCN) Red List of Threatened Species. Even more species are critically endangered, many clinging to grim odds: Fewer than 50 adults survive in the wild.

Fuente (www.nationalgeographic.com): See the Birds We’ve Lost to Extinction—and Those on the Brink