The instincts, also, of birds are no less varied, and more especially in relation to their food. "Caprimulgus[1] is the name of a bird, which is to all appearance a large blackbird; it thieves by night, as it cannot see during the day. It enters the folds of the shepherds, and makes straight for the udder of the she-goat, to suck the milk. Through the injury thus inflicted the udder shrivels away, and the goat that has been thus deprived of its milk, is afflicted with incipient blindness.

"Platea"[2] is the name of another, which pounces upon other birds when they have dived in the sea, and, seizing the head with its bill, makes them let go their prey. This bird also swallows and fills itself with shell-fish, shells and all; after the natural heat of its crop has softened them, it brings them up again, and then picking out the shells from the rest, selects the parts that are fit for food.