I have just witnessed what I think is a kestrel in my garden eating our blackbird!!! It dragged it under our garden bench and proceeded to eat it. Its description is as follows: about the size of seagull, orange brown upper chest, yellow eyes, dark grey top of head, back and uppermost tail with splashes of white dot like makings towards his tail. Fluffy white feathers underneath his tail and also on the lower half of his chest and upper legs. Am I right in thinking this is a kestrel?