The animal group classified as The most critically endangered is the birds and amphibians fish reptiles.

Answer 1

The classification of "critically endangered" refers to species that face an extremely high risk of extinction in the wild. Among the various animal groups, birds and amphibians are particularly noted for having many critically endangered species.

1. Amphibians: Amphibians are considered one of the most threatened groups of animals worldwide, with a significant number of species facing extinction due to habitat loss, climate change, pollution, and disease (notably chytridiomycosis).

2. Birds: Birds also have a substantial number of critically endangered species, often affected by habitat destruction, invasive species, and climate change.

Fish and reptiles also have critically endangered species, but the situation is particularly dire for amphibians and birds. The exact number of critically endangered species can vary over time, so it's essential to refer to updated resources like the IUCN Red List for the most current information.