This portrait of a cuckoo stealing a reed warbler’s egg from its nest - by Oldrich Mikulica, from the Czech Republic - won the European Wildlife Photographer of the Year 2011 competition. Cuckoos remove their host’s eggs and replace it with one of their own - which is nearly identical in appearance. This one has been caught in the act as stares at the camera for a split second before it drops the egg out of the nest. Picture: Oldrich Mikulica / Caters News