A bird is born and raised in captivity. Immediately after release, the bird carries nesting materials underneath the feathers. After three years, the bird starts to consistently carry nesting materials in the bill. This is an example of which of the following?

A) Innate behavior
B) Learned behavior
C) Direct fitness
D) Proximate behavior
E) Ultimate behavior

Learned Behavior

Behavior that an organism acquires or modifies as a result of experiences or interactions with the environment.

Direct Fitness

An individual's reproductive success, measured by the number of viable offspring it produces. Compare with inclusive fitness.

Proximate Behavior

Immediate, mechanistic explanations for biological functions, focusing on the how and why a behavior happens in the context of environmental stimuli.