DIVERS 265 



also a specimen in Booth's collection at Brighton 

 {Zool, 1896, p. 14). 



Weight, 9 lbs. to 12 lbs. Dunn states that in 

 Orkney it attains a weight of 10 lbs. to 16 lbs. 



BLACK-THROATED DIVER. Colymhus arcticus, Lin- 

 naeus. PI. 31, fig. 2. Length, 28 in. ; bill, 2-25 in. ; 

 wing, 12 in. ; tarsus, 3-25 in. 



A rare winter visitant to England and Ireland 

 from October until April, but resident in Scotland 

 and the Hebrides, where it breeds in limited num- 

 bers. The late Lord Erskine gave me two eggs 

 of this species which his gamekeeper had taken 

 in North Uist. It is known to have nested in 

 Orkney, and has been met with in Shetland, al- 

 though it is not quite clear whether it remains 

 to breed there. (See Buckley and Evans' " Fauna 

 of Shetland," p. 206.) In Ireland one with a hlach 

 throat is mentioned by Mr. Warren as having been 

 seen at the mouth of the Moy River, Co. Mayo [Zool., 

 1877, p. 329), and others on the Dublin coast in 

 April and May (Zool., 1879, p. 484). It may be 

 remarked that all three species of Diver occa- 

 sionally remain about their winter quarters long 

 enough to acquire the full breeding plumage. 



iis to the simultaneous moulting of the flight 

 feathers in this species, see Farren, Ann. Scot. 

 Nat. Hist., 1899, p. 114. Divers use their wings 

 under water (Saxby, p. 279). Cormorants do not. 



The weight of the Black-throated Diver varies, 

 according to age, from 5 to 7 lbs. 



