Bottled Blackbirds

During this cold snap, like many people I have been feeding the birds, apart from the usual hanging feeders I also scatter a large amount of mixed seeds on the lawn, this is eagerly noshed upon by a large flock of Rooks and Jackdaws and after they have had enough, the smaller birds enjoy there own share.
Of late the normal seed eaters such as Chaffinches, Sparrows etc, have been joined by 5 or 6 pairs of Blackbirds who seem quite happy to eat the smaller seeds (but oddly enough, not the wheat?)  
What has been entertaining to a degree though is their behaviour toward one another, so intolerant are they of a rival that they will leave an area full of seed (despite an obvious hunger) to chase off the lesser bird even if it is several yards away, and gender seems not to count for ought as the most aggressive is a light coloured female and she sees all others off with gusto. It would seem then, that Blackbird hierarchy is determined by who has the most bottle.

Entertainment value from the commoner species!