"Emrys Davies" wrote de...

Birds have brains.

http://www.pbs.org/lifeofbirds/brain/

Well yes, you only have to know a parrot to realise birds can be quite
intelligent, but it still doesn't explain the disappearance of all our small
birds.
Maybe they have "migrated" to the fields and hedges around here where there
is good picking at the moment but our birdfeeder is full too.

--
Regards
Bob
In Runnymede, 17 miles West of London