Scientists say the ongoing trend may wipe out the work of conservationists, who have for decades fought to restore the population of bald eagles, which were placed on the list of endangered species in the second half of the 20th century.

Scientists say the ongoing trend may wipe out the work of conservationists, who have for decades fought to restore the population of bald eagles, which were placed on the list of endangered species in the second half of the 20th century.