Acrobatic pigeon

We deliberately hung the seed feeder away from any twigs the pigeons could use as perches, because they don't give the small birds a look-in. However, we have been outwitted by this particular pigeon, which spent several days studying the feeder from all angles, then worked out that the only way to get to the seed was to land on the top, swivel round to an upside-down position, hang on with its claws and flap like mad whilst gobbling as much seed as possible. What a genius! We have christened it Einstein.