CHAP. IV. IN ANIMALS. 99 Small birds,, also, as I hear from Mr. Weir, such as various finches, buntings and warblers, when angry, FIG. 13.—Swan driving- away an intruder. Drawn from life by Mr. Wood. ruffle all their feathers, or only those round the neck; or they spread out their wings and tail-feat tiers. With their plumage in this state, they rush at each other with open beaks and threatening gestures. Mr. Weir con- cludes from his large experience that the erection of the feathers is caused much more by anger than by fear, lie gives as an instance a hybrid goldfinch, of a most irasci- ble disposition,, which when approached too closely by a servant, instantly assumes the appearance of a ball of ruffled feathers. He believes that birds when frightened, as a general rule, closely ad press all their feathers, and their consequently diminished size is often astonishing.