During the course of evolution, the eggs of koel have evolved to resemble the host’s (crow) egg in size and colour to reduce the chances of the host bird detecting the koel’s eggs and ejecting them out of the nest.
Mention the changes the koel must have undergone in order to achieve brood parasitism, during the course of evolution.
Answers
Preetam Singh
During the course of evolution, the eggs of koel have evolved to resemble the host’s (crow) egg in size and colour to reduce the chances of the host bird detecting the koel’s eggs and ejecting them out of the nest.