COLUMBIFORMES: Columbidae
Ocyphaps lophotes
All of the pigeon family feed their young "milk".
It is similar to mammal's milk, rich in protein with a fat content greater than cow's milk.
Liquid is produced by the flaking off and liquefying of skin in the bird's crop.
Source: Reader's Digest Complete Book of Birds. 2nd ed. Sydney: Reader's Digest Sydney, 1976.