W.' *,?•' 98 MEANS OF EXPRESSION CHAP. IV. are said not to fly away, but " merely to stick out their feathers and scream/' The Barn-owl, when approached " instantly swells out its plumage, extends its wings and tail, hisses and clacks its mandibles with force and rapid- ity." 14 So do other kinds of owls. Hawks, as I am FIG. 12.—Hen driving away a dog from her chickens. Drawn from life by Mr. Wood. informed by Mr. Jenner Weir, likewise ruffle their feath- ers, and spread out their wings and tail under similar circumstances. Some kinds of parrots erect their feath- ers; and I have seen tliis action in the Cassowary, when angered at the sight of an Ant-eater. Young cuckoos in the nest, raise their feathers, open their mouths widely, and make themselves as frightful as possible. 14 On the Strix ftammea, Audubon, ' Ornithological Bi- ography,' 1864, vol. ii. p. 407. I have observed other cases in the Zoological Gardens.