Chanel-Billed Cuckoo - or Stormbird

If any of you have ever landed one of these in your backyard, you will be well aware of the absolute cacophony they are capable of. It is incessant. This cuckoo was raised by two very unfortunate crows, who are very stressed trying to feed a baby this noisy - who is also much bigger than they are.

These birds lay their eggs in other birds nests and are raised by them at the expense of their actual babies, who are never as loud or as big, and thus often starve to death if a cuckoo egg gets amongst them.