There is a population of birds that differ in feather color and in diet. The green feathered birds eat fish, while red feathered birds eat insects. A drought hits the habitat of this population. The drought has no effect on the insect population, but it dries up the ponds and the fish population declines. The main selective pressure for the birds in this scenario is:

Question

There is a population of birds that differ in feather color and in diet. The green feathered birds eat fish, while red feathered birds eat insects. A drought hits the habitat of this population. The drought has no effect on the insect population, but it dries up the ponds and the fish population declines. The main selective pressure for the birds in this scenario is:
A. The fish population
B. The red feathers
C. The insect population
D. The green feathers

GPT 3.5 · Answer

A. The fish population