36 BIRDS. 



128. Corvus corone L. Carrion-Crow. 



Resident, generally but thinly distributed. Local and scarce 

 in the manufacturing districts. A few breed in the cliffs of 

 the coast, 



129. Corvus cornix L. Hooded Crow. 



Winter visitant, most abundant on and near the coast, where 

 it arrives in October and November, leaving in March and 

 April. In many inland districts it is only of occasional 

 occurrence, whilst to others it is an annual visitor. Has 

 occasionally remained to breed, there being authentic 

 evidence of its having done so on the Hornby estate, near 

 Catterick (Nat, 1865, p. loi). At Hackness, near Scar- 

 borough, a female paired for three successive seasons with 

 a male C. corone — the young resembling one or the other 

 parent (W. C. Williamson, P.Z.S., 1836, p. 76). There are 

 also several instances of its breeding at Flamborough, and 

 possibly in other localities where it has been observed 

 throughout the summer. 



130. Corvus frugilegus L. Rook. 



Resident, generally distributed, abundant. Immigrants in 

 large numbers come in from the continent in October and 

 November. In 1846 two pairs bred on chimneys in the 

 town of Hull. 



131. Corvus corax L. Raven. 



Resident, now restricted to a very few pairs in the North- 

 western Fells, and possibly a pair may also still exist in 

 Cleveland. At the commencement of the present century 

 it was fairly general in its distribution, breeding in woods, 

 fells, and sea-cliffs, and even on the mausoleum at Castle 

 Howard. Owing to the persecution to which this species 

 has been subjected, its extermination as a Yorkshire bird 

 is now only a question of a few years. 



Order 2. MACROCHIRES. 

 Fam. CYPSELIDiE. 



132. Cypselus apus (X.). Common Swift. 



Summer visitant, generally distributed and common, except 

 in the manufacturing districts, where it is more or less 

 scarce. Arrives in the first week of May, occasionally 

 remaining as late as the second week of October. A few 

 nest in the cliffs at Flamborough. 



