394 On the Oryiitholoyij of tlie Ishuul of Texel. [Ibis, 



species in the north, and being more migratory in its habits 

 than any other of the gulls, one would expect to find it 

 a regular autumn and spring migrant there, as is the case 

 on the Suffolk coast. 



GrREAT Black-backed Gull. 



Nowhere have I seen congreo-ated tooether such numbers 

 of adults of this species as on the sand-banks of the Vlakte 

 van Kerken. There were several hundreds in one flock 

 alone, and the sand-banks looked black and white with them. 

 These baidvs are evidently favourite places for the adults to 

 congregate during their moulting period. Immature birds 

 were rather uncommon. After 21 September this species 

 was not so much in evidence. Recorded as breeding by 

 Thijsse, but by no one else of recent years. 



Richardson's Skua. 



First noted on 24 Septem])er, after which odd birds were 

 seen on several days, but they disappeared about the same 

 time as the Sandwich Terns, their chief victims. 



Guillemot. 



A single bird was noted on 2 October. 



Little Grebe. 



A single bird was seen in one of the dykes on 28 Sept- 

 ember, but its haunts were not visited much. " Breeds on 

 Texel, but on none of the other islands" (L.J.). "Occurs 

 in the spring ; breeding in 1913'^ (V-)- 



In addition to these records, the following species should 

 be mentioned though not positively identified : — Corn- 

 Bunting, one on 19 September ; Little Ringed Plover, 

 two on 21 September — a most likely species to occur; 

 Gyr Falcon, a bird seen on 5 October, ascribed by 

 Mr. Bonhote to this species. The Corn-Bunting has been 

 recorded as breeding on Ameland, where, however, Leege- 

 Juist did not meet with it. It is a scarce bird in North 

 Holland. Two birds seen on 7 October were doubtfully 

 ascribed by Mr. Bonhote to Richard's Pipit. 



