Pigeons about to fledge.

Yes they provide crop milk in the early stages, then regurgitate as the chicks grow. :)
 
AFAIK the only bird that feeds its young milk. :)

Emperor penguins and flamingos do too. Believe it or not it's the male emperor penguin that produces it, not the female.

Edit - I forgot the dove. Closely related to the pigeon they do as well. :)
 
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Emperor penguins and flamingos do too. Believe it or not it's the male emperor penguin that produces it, not the female.

Now you mention it I have watched Flamingos doing it but I didn't know that Emperor Penguins did. :)
 
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