. A history of British birds . which are commonly obtained on theContinent, in some parts of which grey birds decidedly pre-dominate in number, if they do not occur exclusively. Itmay be observed that it is common to many species of Owlsto have both a rufous and a grey or brown plumage, and itis not always possible to account for the discrepancy throughsex or age. Messrs. Buckley and Elwes mention a perfectly blackOwl in the collection of Mr. Kobson at Ortakeuey, nearConstantinople, which they consider to have been a melauitevariety of this species. Mr. Gurney is of opinion thatAlgerian exampl
. A history of British birds . which are commonly obtained on theContinent, in some parts of which grey birds decidedly pre-dominate in number, if they do not occur exclusively. Itmay be observed that it is common to many species of Owlsto have both a rufous and a grey or brown plumage, and itis not always possible to account for the discrepancy throughsex or age. Messrs. Buckley and Elwes mention a perfectly blackOwl in the collection of Mr. Kobson at Ortakeuey, nearConstantinople, which they consider to have been a melauitevariety of this species. Mr. Gurney is of opinion thatAlgerian examples exceed in size those from Europe andWestern Asia. The vignette represents the sternum of this species, whichwhen compared with that of the Falcon previously figured,shews a great deficiency in strength. The keel has butlittle depth, the sides are narrow, while the furcula is espe-cially slender and weak. In some Owls the median portionof the furcula is not ossified, and the lateral portions areonly connected by a 154 ACCIPITIIES. STRIGIDiE STRIGTD^E.
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Keywords: ., bookauthorsaun, bookcentury1800, bookdecade1870, booksubjectbirds
