296 THE BIEDS OF SUSSEX. 



BLACK-THROATED DIVER. 



Colymbus arcticus. 



This may be considered the rarest of the three Divers^ hut is 

 occasionally met with in the Channel, mostly in the imma- 

 ture dress, or while undergoing the change into that of the 

 adult. Its habits do not appear to differ from those of the 

 Great Northern Diver. I have a note that one of this 

 species, in the mature plumage, was shot on the river Adui", 

 close to Beeding chalk -pit, on March 6th, 1840; also that an 

 immature examjale was shot near Crawley, November 28th, 

 1850, some fourteen miles from the sea.* 



Mr. Knox mentions that he has a remarkably fine adult 

 bird in his collection, which was shot in Chichester Harbour in 

 the winter of 1845 ; that he had seen one at the Mechanics' 

 Institute at Hastings, which had been killed near that town ; 

 and that a third, in the Chichester Museum, was sent from 

 Selsey. 



Mr. JeflPery in his p. n. alludes to one at Selsey in Janu- 

 ary 1859, one at Sidlesham in mixed adult and immature 

 plumage; and says that he saw several at Chichester in 

 November 1865, and one in full summer plumage in April 

 1866. He records, in 1873, one at Bosham; in January 

 1875, several in Chichester Harbour ; and one at Bosham in 

 1877. Mr. Ellman records one in winter plumage, obtained 

 at Pevensey, in December 1850. 



It breeds in Scotland on the mainland in preference to the 

 little Loch islands, and not so close to the water as the 

 preceding species. 



* I liave lately seen a specimen in winter plumage which was shot 

 some years ago on the lake at Kuepp. 



