Biology

Marissa

7 August, 12:37

Studies indicate that global warming has caused a shift in the migratory patterns of some bird species. Such changes in migration patterns may have adverse effects on some bird populations because

A) scientists are no longer able to study the migratory habits of these birds.

B) bird species from the south have started flying north during winter, reversing the original trend.

C) the birds may arrive too early or too late to take advantage of the peak numbers of their insect preys.

D) some species of birds have stopped migrating due to more suitable conditions at their place of origin.