Passer domesticus
Noisy and gregarious, these cheerful exploiters of man's rubbish and wastefulness, have even managed to colonise most of the world. The ultimate opportunist perhaps, but now struggling to survive in the UK along with many other once common birds. They are clearly declining in both gardens and the wider countryside and their recent declines have earned them a place on the Red List. (Info from www.rspb.org.uk)