Is there a bird that actually produces milk for their young?

jk18

Like mammals, the young of some birds are fed on special secretions from a parent. Unlike mammals, however, both sexes produce it. The best known of these secretions is the "crop milk" that pigeons feed to squabs. The milk is produced by a sloughing of fluid-filled cells from the lining of the crop, a thin-walled, sac-like food-storage chamber that projects outward from the bottom of the esophagus. Crops are presumably a device for permitting birds to gather and store food rapidly, minimizing the time that they are exposed to predators. Crops tend to be especially well developed in pigeons and game birds. http://www.stanford.edu/group/stanfordbirds/text/essays/Bird_Milk.html [Text added from provided link -- original text deleted along with one link -- Zb] Jul 19 08, 10:50 AM

cyberhen

There are also some species of parrot that produce crop milk. Crop milk, also known as pigeon's milk, is a secretion from the lining of the crop of pigeons and doves with which the parents feed their young by regurgitation. Similar crop milk is also produced by flamingos. http://en.wikipedia.org/wiki/Crop_milk [Text added -- Zb] Jul 19 08, 12:42 PM