I've just got an email from the RSPB to take part in their annual survey this weekend which is celebrating its 30th anniversary this year. You simply spend an hour counting the birds that come into your garden.
Now in very recent past, since we installed the new bird table, we have had large numbers of pigeons and ring-collared doves, some starlings, blackbirds, sparrows, a couple of chaffinches, a pair of blue tits, magpies, a pair of jays, a tiny little wren and even a woodpecker. What's the betting the hour I sit to do my count I'll just get 12 pigeons and that is it... :-)
Go here if you are interested in taking part by the way.