Cuckoo

The cuckoo is an obligate brood parasite. That is, it survives only by deceiving a host into rearing the cuckoo's offspring. Essentially, the cuckoo hatches in the nest first and then proceeds to boot the host's own eggs out. This means it gets all the food and nurture. On maturity, it then flies off to do its own thing. It probably thinks that in some way, it is a member of the host species.

I've seen this happen with wyverns too. Except that in the case I'm thinking of, one of the members of the host species made the serious mistake of importing a cuckoo. Said cuckoo then proceeded to attempt to mimic a wyvern. Although nobody was really convinced, such is the power of resident incumbency that the cuckoo was able to kick the wyvern's own children out.

Fortunately, wyverns are independent creatures and seem to be able to set up their own nests almost from birth. Yes, I know this whole post is screwed-up mythology. You had to be there.

Meanwhile, we await the real event of the night: the final game of the 2010 World Cup.