Not much else to do in the winter but look for gulls and think of all the Beatles songs that have something to do with birds:
And your bird can sing
Norweigan Wood (And this bird as flown)
Blue Jay Way
Also there a song called 'Flying' which I reckon is about birds, Gerby reckons that Lucy in the Sky with Diamonds was a bird and there is also a reference to birds singing in 'Till there was you'. Also there is Free as Bird- recorded from beyond Lennon's grave and a version of Across the Universe has the sounds effect of a swan taking off. Can't think of anything else..