There is a Bird on Your Head! by Mo Willems

You should read this book. It is so cool. It is a funny book too. Piggy and
Elephant are playing outside and one bird lands on Elephant´s head. Then another bird lands on Elephant´s head. Then the two birds fall in love and they build a nest on Elephant´s head. Then they have eggs and they hatch. Then Elephant asks the birds to please go somewhere else. Then they do, but they just land on Piggy's head.

BTB