which male bird produces milk for its young?
Both female and male pigeons produce a nutrient-rich substance in their crop to feed their young (squabs). This substance has been likened to lactation in mammals and is known as pigeon “milk.” During lactation, a curd-like substance is created from the cells that line the bird’s crop (a pouch found in the bird’s throat). At mealtime, one or both parents will regurgitate the substance into the eager mouths of the young squabs. Pigeons are one of only three bird species that produce milk — the other two are flamingos and male emperor penguins.
which male bird produces milk for its young?
Birds are a group of warm-blooded vertebrates constituting the class Aves (/ˈeɪviːz/), characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweight skeleton. Birds live worldwide and range in size from the 5.5 cm (2.2 in) bee hummingbird to the 2.8 m (9 ft 2 in) ostrich. There are about ten thousand living species, more than half of which are passerine, or “perching” birds. Birds have wings whose development varies according to species; the only known groups without wings are the extinct moa and elephant birds. Wings, which are modified forelimbs, gave birds the ability to fly, although further evolution has led to the loss of flight in some birds, including ratites, penguins, and diverse endemic island species. The digestive and respiratory systems of birds are also uniquely adapted for flight. Some bird species of aquatic environments, particularly seabirds and some waterbirds, have further evolved for swimming.