36 STUDIES IN BIRD-MIGRATION 



October. A solitary individual only came under notice 

 at the lantern during the important nocturnal movements 

 which took place in the latter half of September. The 

 second occasion on which this species was observed at 

 the light was during the great night movement of 17th to 

 1 8th October, when thirty-two examples were killed or 

 captured, all of them of the ordinary green-headed race. 

 I secured only one specimen of the purple-headed 

 form, and this came from the east on the afternoon of 

 28th September. I much regretted not being able to 

 ascertain to what race the vast numbers passing from 

 east to west belonged, for not a single bird came aboard 

 during the larger movements. It was impossible to 

 say from what quarter the birds taken during the night 

 movement alluded to came. Some of my friends regard 

 the purple-headed birds procured by me at the Eddy- 

 stone as merely fresh-moulted specimens of the ordinary 

 bird. If this be so, how is it that all the fresh-moulted 

 examples obtained at the Kentish Knock at an almost 

 identical date had green heads ? 



CoRvus MONEDULA, Jackdaw. — A few appeared 

 from the east at 4.25 p.m. on 17th October, and others 

 followed and were flying round the ship until 5 a.m. on 

 the 1 8th. Two were captured. 



CoRvus FRUGiLEGus, Rook. — The first Rooks appeared 

 in small numbers from the east at 5 p.m. on 17th October, 

 being preceded by a few Jackdaws. Later several 

 appeared at the lantern, and flew in the rays of light 

 from 7 P.M. to 3 A.M. on the 18th, an adult being 

 captured. 



Alauda arvensis, Skylark. — This species was more 

 in evidence than any other, and its movements were of a 

 singularly varied nature. As an emigrant from Britain 



