Hi

This is vaguely OT but I was wondering how birds almost immediately know when I
start to put food out for them?

I don't feed in the summer, but as soon as I put any crumbs out the birds seem
to whiz down in three minutes flat to feed. Their mates seem to hear about it
too and before long the garden is humming!

The feeder is hanging in a sumac tree so they don't come to it much in summer as
it has no fruits or berries. It's can't be that they see me go near the tree, as
I tend the plants around its base all year long........

Do they have amazing eyesight - a terrific sense of smell - do the know what
time of year I start to feed - or what ??

Jenny