When Tinbergen (1960) was observing birds bringing insects to their chicks, he noticed that they took insects in unexpected proportions.
A) The birds always took the same number of each species, even as the species' relative numbers changed over the season.
B) The birds captured the different species in proportion to their abundance as the season progressed.
C) When a species became more common, it was taken more frequently than would be expected.
D) When a species was low in numbers, it was taken more frequently than would be expected.

Question

Quizplus · Accepted Answer

Tinbergen observed that birds took more of a species when it became more common, indicating a preference for more abundant prey.

When Tinbergen (1960) Was Observing Birds Bringing Insects to Their