NOTES ON RICHARDSON S SKUA. 



235 



Species. 



Date. Girth, at Bole. Height. 



Ft. Ft. 



Tit uya plicata, Don (gigautea, 



Nut.); Giant Thuya, - June, '07 5 2 

 Abies pectinata, DC. ; (Silver 



Fir. No. 1 of " The 



Union Trees," planted 



Ft. In. Ft. 

 5 



July, „ 16 



H 



1707, 



Do., on stable path, April, 06 12 2j 



Pseudotsuga Douglasii, Carr; 



Douglas Fir, 



?) 



J5 



D 



5 



5 10J 5 



Picea excelsa, L. ; Spruce, - July, '07 5 1 1 \ 5 

 Cedrus atlantica, Manetti \ 



Atlas Cedar, - - „ „ 5 2J 5 



Pinus sylvest?'is,Jj.[ Scots Fir, 



in flower garden, planted 



1707, - - - - „ „ 10 5 5 

 Larix europcea. DC. ; Larch, 



near bridge, - - - June, '07 8 2h 5 



. * Height in 1902. 



104 



60 



21 87 



* 



Notes on Richardson's Skua (Stercorarius crepidatus, Gm.), 



By Robert W. S. Wilson. 



[Read 23rd June, 1908.] 



Richardson's Skua belongs to the small group of parasitic gulls, 

 of which we have four species in this country, namely, the Great 

 Skua (Megalesti'is catarrhactes, L.), Pomatorhine Skua (Stercorarius 

 pomatorhinus, Temminck), Richardson's Skua [IS. crepidatus, 

 Gmelin), and the Long-tailed Skua (S. parasiticus, L.), the 

 first and third being nesting species here. Richardson's Skua is 

 the most abundant of the genus, nesting in plenty on the Orkney 

 and Shetland Islands, and more sparingly on the Hebrides and 

 in some parts of the North of Scotland. In the Clyde Area, it 

 occurs in spring and autumn in most years. At Fairlie I have 

 observed it from the beginning of August till November. 



