Why have populations of neotropical migrants (birds that migrate from the U.S. to the tropics every year) such as tanagers declined so greatly in recent years even though their forest habitats in North America are relatively stable?
A. Loss of habitat in Central and South America.
B. Pollution in the U.S.
C. Colder winters in the U.S.
D. They are being hunted for food in the tropics.
Answer: A
Environmental & Atmospheric Sciences
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