38 STUDIES IN BIRD-MIGRATION 



Lapwings were heard passing overhead from east to 

 west. 



PiiALAROPUS HYPERBOREUS, Red-iieckecl Phalarope. — 

 At midday on 30th September, one was seeking food on 

 the water at some little distance from the ship. 



ToTANUS iiYPOLEUCUS, Comvion Sandpiper. — Heard 

 passing southwards at 10.45 ^-M. during the night 

 movement of i8th September, when Redstarts and Pied 

 Flycatchers were flying around the lantern. 



Sterna fluviatilis, Common Tern, — An immature 

 example appeared and alighted on the rail during the 

 forenoon of 29th September. 



RissA TRiDACTYLA, Kiltizvake, — Adults and young 

 were common from 22nd September onwards. 



Larus argentatus, Herring-Gnll. — An adult seen 

 on 15th October was the only example of this species 

 observed. 



Larus fuscus, Lesser Black - backed Gidl. — Seen 

 almost daily, but in greater numbers after 2nd October. 



Larus marinus, Greater Black-backed Gull. — A few 

 seen daily after 3rd October. I never noticed any 

 decided movements on the part of gulls. 



Stercorarius pomatorfiinus, Pomatorhine Sktca. — 

 From 7th October was seen daily in attendance upon 

 the Lesser Black-backed Gulls and Kittiwakes. Few 

 mature birds were seen. 



Stercorarius crepidatus, Arctic Sktca. ■ — ■ Present 

 daily from 24th September onwards, chiefly engaged in 

 bullying the Kittiwakes and sometimes the Lesser Black- 

 backed Gulls. The dark form largely preponderated. 



FuLMARUS GLACiALis, Fitlviar. — On 2nd October 

 one was observed flying southwards at 5.45 p.m. 



CoLYMBUS SEPTENTRioNALis, Red- throated Diver. — 



