140 Mr. W. Eagle Clarke — Bird-migration 



27. CORVUS FRUGILEGUS. Rook. 



The first Rooks appeared in small numbers from the E. 

 at 5 p.m. on Oct. 17th, being preceded by a few Jackdaws. 

 Several others made their appearance later, flying in the rays 

 of light from 7 p.m. to 3 a.m. on the 18th, and an adult was 

 captured at the lantern. 



28. Alauda arvensis. Skylark. 



This species was more in evidence than any other, and its 

 movements were of a singularly varied nature. As an emi- 

 grant it was observed moving to the S.S.W., S., and S.E. ; and 

 an immigrant to the W. and N.W. It participated largely 

 in the southerly emigrations, both by day and night, during 

 the latter half of September. It was also the most frequent 

 visitor to the light, aud was never absent from any of the 

 night-movements. As with other species, its pronounced 

 flights from E.to W. were not observed until Oct. 8th, but after 

 that date it took a prominent part in all the great movements. 

 It was present in numbers during the great night-migration 

 of Oct. 17th-18th. Many were killed or captured at the 

 lantern. 



29. Tixnunculus alaudarius. Kestrel. 



An adult male flew in the rays and approached the lantern 

 continually between 8 p.m. of Sept. 18th and 1.30 a.m. on 

 the 19th. 



30. Phalacrocorax carbo. Cormorant . 

 Single birds were seen on Sept. 18th and 21st. 



31. Sula bassana. Gannet. 



Not unfrequently seen, moving chiefly southwards, aud 

 always in adult plumage. Did not fish in the vicinity of the 

 lightship. 



32. (Edemia nigra. Common Scoter. 



First seen on Sept. 28th and frequently afterwards, usually 

 flying towards the feeding-grounds under the shelter of the 

 sands. Many seemed to arrive from the W. on Oct. 8th. 



