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Growing Species

CARLOS A. CARRENO—C3.PHOTOS/GETTY IMAGES

The Environmental Protection Agency lists animals that are endangered. These species are protected. Learn about four species whose populations have recovered.

Least terns (above) are in the same family as seagulls. They live in the central U.S. The birds were endangered for 36 years. They were delisted in February 2021.

The gray wolf population has rebounded in some areas. The animals were delisted in Montana, Idaho, and Wyoming. That was in 2017.

KATHLEEN REEDER WILDLIFE PHOTOGRAPHY/GETTY IMAGES

Humpback whales are found in oceans all over the world. Some populations are making a comeback. In 2016, 14 populations were delisted.

WILDESTANIMAL/GETTY IMAGES

Lesser long-nosed bats are only three inches tall. The species can be found in Arizona and New Mexico. These bats were delisted in 2018.