36 BIRDS, 
128. Corvus corone ZL. 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 Z. 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. tor). 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 Z. 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 Z. 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. CYPSELIDZ. 
132. Cypselus apus (Z.). 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. 
