BLAOK-THROATED DIVER — GREAT CRESTED GREBE. 177 



THE BLACK-THROATED DIVER, 



Colymbns arcticus. 

 The Black-throated Diver is a casual visitor of rare occur- 

 rence. Dr. Ku'tland informed the Messrs. Matthews of one, 

 in immature plumage, shot near Cassing-ton in the winter of 

 1838 [Zoologist, p. 2540), which^ however^ mai/ have been the 

 Northern Diver preserved in the Museum ; and an entry in 

 Mr. T. Beesley's note-book, under the date 31st January, 

 1 849, refers to another in the same dress shot on Clattercote 

 Reservoir. A thu'dwas shot in January, 1877, on the Cher- 

 well, near Banbmy, by a boatman named Hunt (C. M. Prior, 

 Zoologist, 1877). 



THE RED-THROATED DIVER. /6^ 



Colymbus septentrional is. 

 The Red-throated Diver is a casual visitor. In the neigh- 

 bourhood of Weston-on-the- Green, according to the Messrs. 

 Matthews, it was occasionally found during the winter [Zoolo- 

 gist, p. 2540). There is an example in the Museum, procured 

 at Sandford in 1828, and one was shot on the Thames below 

 Henley, on the 9th February, 1848, by Mr. G. Jackson (A. 

 H. Cocks iii lit.). The Red-throated Diver has also occurred 

 at Over Norton (W. Wyatt). The last occasion on which it 

 has been obtained was in March, 1888, when two were shot 

 at Oxford, one on the river near the railway station, and the 

 other near the mouth of the Cherwell ; the latter, which I saw 

 at Mr. Darbey^s, was an adult in winter dress. 



THE GREAT CRESTED GREBE, * / 



Podiceps cristatus. 



The Great Crested Grebe is a resident, from early spring 



until late autumn, on Clattercote Reservoir, where two pairs 



have bred for several years past. Even in the mildest seasons 



they do not pass the winter there ; I have never seen them in 



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