4 REPORT ON THE MIGRATION OF BIRDS. 



Oct. 1st to 10th S. ; 10th to 13th strong W. ; 14th gale from E., 

 and continued E. and S.E. to end of month. S.E. to S. strong 

 winds and gales, or light from Nov. 1st to 11th ; S.W. strong 

 and a gale 15th and IGtli ; frost on 17th ; 22nd S. to S.W. and 

 W., heavy gales in N. and W. Unsettled, with frequent changes 

 of wind and weather, many W. gales till end of month, and till 

 Dec. 8th. N. and E. on both coasts from Dec. 9th to 12th, S. 

 on 13th, and S. and W. on 14th ; S. and W. till 20th, when E. ; 

 and W.K.W. on 21st. Prevailing W. and S.W. till end of month. 



Notes. — Prevailing winds at the time of the rush of Falconidce 

 were W., veering from S.W. to N.W. in Aug. ; after 23rd E.; 

 on and after Aug. 31st till Sept. 6th N. At XIV., on Aug. 19th, 

 a Sparrowhawk was seen sitting on the ground, and almost daily 

 for some time after. The nearest breeding-place I know of is at 

 Tongue, N. Sutherland; wind at the time was light S., and. 

 weather clear. No doubt it is difficult to discriminate often 

 between local and general migrations of Hawks by our data ; thus 

 at XIV. also, on Aug. 23rd and 24th, a Sparrowhawk was seen 

 flying south on the former date, and N.E. on the latter; on the 

 former date the wind was light S., on the latter N.E. ; this would 

 therefore appear like a local migration. 



The only addition to the list of stations is Fair Isle, No. 7 b. 



In all spring records the numbers of stations begin at the 

 most southerly, or with the higher numbers. In all autumn 

 records the numbers of stations begin at the most northerly, or 

 with the lower numbers. The maximum station, or station 

 sending most returns of the species, is indicated when -thought 

 necessary. 



TuRDiD^. — Autumn : Records at Sumburgh Head, Pentland 

 Skerries, Girdleness, Bell Eock, and Isle of May (maximum). 

 Earliest at Isle of May, Sept. 22nd ; latest at Sumburgh Head, 

 Dec. 8th. Piushes at Isle of May, Sept. 22nd to 30th (see notes 

 infra) ; also Oct. 20th. Ptedwings and female Blackbirds mi- 

 grating between 14th and 24th. Great S.E. gale on 14th. At 

 Pentland Skerries, Fieldfares, Thrushes, and Blackbirds, Nov. 

 5th and Gth, flying N.E. all day; -also smaller rushes at Sum- 

 burgh Head, Dec. 1st to 8th. Time of day : Mostly daytime, but 

 night of 13th to 14th at Bell Pock. *' Storm burst at 10.10 a.m. 

 on 14th." Notes : A great rush of migrants took place at the 



