. How to sex cage birds (British and foreign) . n its distinctly broaderand shorter bill. This character also serves to distinguish theother species of the genus. Blue Jay (Cyanocitta cHstata). The bill of the female is distinctly shorter than that of the male,and, when viewed in profile, is seen to be noticeably deeper. Thisdifference will also serve to separate the sexes of other species inthis genus. Blue-bearded Jay (Cyanocorax cyanopogon). I could discover no sexed specimens in the British Museum series,but the sexes doubtless differ, as in the following: — Pileatkd Jay [Cyanocorax chryso
. How to sex cage birds (British and foreign) . n its distinctly broaderand shorter bill. This character also serves to distinguish theother species of the genus. Blue Jay (Cyanocitta cHstata). The bill of the female is distinctly shorter than that of the male,and, when viewed in profile, is seen to be noticeably deeper. Thisdifference will also serve to separate the sexes of other species inthis genus. Blue-bearded Jay (Cyanocorax cyanopogon). I could discover no sexed specimens in the British Museum series,but the sexes doubtless differ, as in the following: — Pileatkd Jay [Cyanocorax chrysops).* When viewed from above, the hill of the female is distinctlybroader than that of the male, hut there seems little, if any, differencein its length. * This is the scientific name given to the species in the Museum Catalogue, Crow-Like Birds. 85 Canada Jay (Perisoreus infaustus). The bill of the female is heavier and shorter than that of the with the preceding Jays, there is little, if any, difference ofplumage between the HEAD OF MALE AND FEMALE ENGLISH JAY. The Pies. Chinese Blue Pie (Urocissa sinensis). The female is smaller than the male, and her bill is shorter andheavier in character. Occipital Blur Pie (Urocissa occipitalis). Tri this species the bill of the female is far stronger than that ofthe male. 86 How to Sex Cage Birds. Hunting Cissa (Cissa venatoria).Here, again, the female has the stronger bill. Wandering Tree-Pie (Dendrocitta rufa). The female is browner than the male, and has a much strongerbill. Chinese Tree-Pie [Dendrocitta sinensis). This species is somewhat abnormal, the male having a slightlyheavier bill than the female ; he lias more blue in his plumage. Himalayan Tree-Pie [Dendrocitta himalayensis). The female is generally less grey than the male, and has theheavier bill. Chinese 13luk Magpie (Cyanopolius cyanus). Tn the female the bill is much shorter and less pointed than thatof the male. Spanish Blue Magpie [Cya/nopoUus cooki).
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