158 STUDIES IN BIRD-MIGRATION 



SuLA BASSANA, Gauiiet. — A considerable number 

 are to be observed fishing in the tideway, just off the 

 island, throughout September. I have seen them thus 

 engaged when it was nearly dark. A few are still 

 present at the end of the first week in October, but 

 only one or two are occasionally observed in November 

 and December. Small numbers are seen at intervals 

 in the spring — five were noticed on 22nd May 19 10. 



Anser anser, Grey Lag-Goose. — "Grey Geese" are 

 recorded annually on their autumn passages, and some- 

 times in the spring. It is only now and then that one 

 has been obtained, owing to the open nature of the 

 ground they frequent. Thus our information regarding 

 the dates of occurrence of the various species which have 

 appeared is meagre in the extreme. 



On 3rd November 1908, a party of seven Grey Lags 

 arrived, and fortunately their identity was satisfactorily 

 established. On 9th October 191 1, two came under the 

 notice of the Duchess of Bedford. 



Anser albifrons. White-fronted Goose. — The wing 

 of a bird of this species, which had been shot in the 

 autumn of 1905, was sent to me for determination. 



Anser brachyrhynchus, Pink-footed Goose. — During 

 my visit in 1909, a party of eight of these birds appeared 

 on 7th October, from which one was shot. I afterwards 

 identified others which arrived on the 12th and i8th; on 

 the latter date fourteen were observed. 



Branta leucopsis, Bernacle Goose. — Single birds 

 were seen on several occasions between 8th January and 

 1st March In 1909. The head of one shot in January 

 was forwarded to me as proof of identification. 



Branta bernicla, Brent Goose. — On 25th May 19 10, 

 four were observed, and on 27th two. The only 



