Smudge, a cuckoos egg is about the same size as a robins...maybe a tiny bit bigger. A gulls egg is the size of a feckin' ostriches in comparison! A female cuckoo first takes an egg out of the nest she's going to lay in, lays her egg and then either swallows the egg she's taken or crushes it in her throat and swallows the contents, coughing up the shell and spitting them out. I'd like to see her do it with a gulls egg!! The host needs to be an insect eater. The young cuckoo, when hatched, has to evict the eggs or chicks out of the nest (the urge to do this can last about 3-4 days). How the feck