735 

 BLACK-THROATED DIVER. 



Colymbus arcticus (L.). 



Winter visitant, uncommon ; rarer on the coast than C. glacialis, 

 but more frequently observed inland. 



The earliest known occurrence of this species in the county 

 is, apparently, that included in Hogg's "Birds of S.E. Durham 

 and N.W. Cleveland," where it is stated that one was shot on 

 the coast in January 1830 (ZooL 1845, p. 1181). 



Thomas Allis's Report contains the following, written 

 in 1844 : 



Colymbus arcticus. Black-throated Diver Hugh Reid says one 

 was shot near Doncaster in most perfect plumage, and is now in the 

 possession of the Rev. J. R. Miller of Walkingham ; and that another 

 equally fine specimen, killed there, remains in his own possession ; it is 

 rare near Hebden Bridge ; a young bird was shot at Elland, near Halifax, 

 1 7th November 1832 ; and I have had two or three immature birds, 

 without the black throat, from the neighbourhood of Sutton-on- 

 Derwent ; it is very rare near Huddersfield, but a few stray specimens 

 have been taken. 



This handsome bird is a winter visitant on the coast, but 

 later in its arrival, and less numerous, than the preceding 

 species. Like the Great Northern Diver, it is very seldom 

 met with in the adult stage ; a female, in the late W. W. 

 Boulton's collection, was procured on the river Hull, near 

 Beverley ; and another, taken in the Humber on i6th 

 February 1870, is in the collection of Capt. Seddon ; one was 

 noted at Bridlington in February 1876 ; one at Filey on loth 

 December 1875 ; and my collection contains a male example, 

 in almost full breeding plumage, captured within twenty yards 

 of the shore opposite Redcar, on ist December 1890. Immature 

 specimens have been reported from most stations on the 

 coast line at irregular intervals, and it was especially abundant 

 in 1876. I have obtained two at Redcar : one on 2ist Nov- 

 ember 1878, and the other on 3rd February 1893 ; whilst I 

 have examined three others which occurred there. 



The Black-throated Diver, although rarer than C. glacialis 



