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ON THE MORE IMPORTANT ADDITIONS TO OUR 

 KNOWLEDGE OF BRITISH BIRDS SINCE 1899. 



BY 



H. F. WITHERBY and N. F. TICEHURST. 

 Part XYIII. 



{Co7itinued from page 308.) 



SABINE'S GULL Xema sahinii (Sab.). S. page 657. 



Immature birds appear to occur almost regularly in autumn 

 on the Norfolk coast, while occurrences have been recorded 

 of recent years from Cornwall, Somerset, Yorkshire, Derby, 

 and Hants. An adult bird was shot near Rye, Sussex, on 

 October 20th, 1891. (N. F. T.) 



Scotland. — Skerryvore. — One immature bird on February 

 10th, 1905, and one on November 30th, 1907 {Ann. S.N.H., 

 1906, p. 202, and 1908, p. 205). Argyllshire.— An immature 

 bird received for preservation on October 30th, 1903, from 

 Easdale (C. H. Bisshop, i.e., 1904, p. 57). 



The breeding of this species on Spitzbergen has now been 

 proved beyond doubt by the discovery in 1907 by Professor 

 Konig's expedition of a nest with two eggs, from which the 

 parent birds were shot (F. C. R. Jourdain in litt.). 



WEDGE-TAILED GULL Rhodostethia rosea Macgill. 

 S. page 659. 



Nesting Habits. — In the delta of the Kolyma River, N.E. 

 Siberia, it was found breeding numerously by Mr. S. A. 

 Buturlin in 1905. Though snow was still deep, and the ice 

 had only just broken up on the river, incubated eggs were 

 found on June 13th. The birds nest in small colonies of ten 

 to fifteen pairs. Early in July young in down were found. 

 The eggs, young in down, and young in first plumage, are fully 

 described {Ibis, 1906, pp. 131-139, 333-337, 610, and PL XX. 

 (eggs), 661-666, 1907, PI. XII. (young in down)). 



LITTLE GULL Larus minutus Pall. S. page 663. 



This species being of fairly regular occurrence on the east 

 and south-east coasts of England, and especially so on the 

 Norfolk coast and the east coast of Scotland in autumn and 

 winter, we have not quoted the records. 



