Get your own nest!

I read about the cuckoo today. This bird does not build its own nest. It lays its egg in the nest of another bird. That bird is then held responsible for caring for the egg and raising the young bird. The young cuckoo is usually larger than the other baby birds. The cuckoo throws the other babies out of the nest so that she gets all of the food.

I am sure this would make a great illustration for something. What say ye?