In spring or early summer the young peregrine naturally begins to moult; and as soon as this tedious operation is concluded she becomes, if wild, a "haggard," and if tame, an "intermewed" hawk. In any case she is described as "blue," and not "red." There is some doubt as to the meaning of the term haggard, many authorities, including the lexicographers, deriving it from the Saxon _hag_, meaning hedge. A more rational explanation seems to be that which traces it to the Hebrew word _agar_ or _hagar_, meaning wild, as it is used in the Old Testament. Wildness, indeed, is always regarded by Shakespeare and other writers as the characteristic of the adult wild hawk, and not any liking for hedges, to which no peregrine is very partial. The language, or jargon, of falconry appropriated to the falcon, and, by analogy, to other hawks, especially of the long-winged species, special terms for various parts of her body and various movements and conditions; much in the same way as several of the Oriental languages describe the actions of royalty by special names. Thus her wings are sails: the long feathers of them are flight feathers; and of these the outer are principals; and next to them are the flags. Her tail is her train; and the two central feathers of it are deck feathers. Her lower leg is an arm, and her foot a hand, with petty singles instead of toes, and talons instead of vulgar claws. Her nostrils are nares; her breast feathers are mails; her lower intestine is her pannel; and her crop her gorge.