Migratory species at risk worldwide, landmark U.N. report says

The first such report finds that 1 in 5 is threatened with extinction and 44% are seeing their populations decline. Humans are to blame, the report says.

Migratory species at risk worldwide, landmark U.N. report says
The first such report finds that 1 in 5 is threatened with extinction and 44% are seeing their populations decline. Humans are to blame, the report says.