Well I never knew that!!
"Alf King" wrote in message
On Tue, 10 Sep 2013 07:56:30 +0100, "'Mike'"
So therefore the fact that we, and lots of other gardeners feed the birds
general make the Pigeons nest build and breed. Why not the other birds?
Pigeons feed their young on "milk" which is created in their crop from
what they can find, mostly seeds and other vegetation; they can make
this all year round. Almost all other birds feed their young on
invertebrates which are pretty scarce in cold weather.