WASHINGTON—Animal protection and conservation groups sued the U.S. Fish and Wildlife Service today for missing its deadline to decide whether the common hippopotamus should be protected under the U.S. Endangered Species Act. In 2022 Humane Society International, the Humane Society of the United...

WASHINGTON—Animal protection and conservation groups sent notice today of their intent to sue the U.S. Fish and Wildlife Service for missing its deadline to decide whether the common hippopotamus should be protected under the U.S. Endangered Species Act. The deadline results from a 2022 petition...