NOTES ON Richardson's skua. 235 



Species. Date. Giktii. at Bole. Height. 



Ft. lu. Ft. Ft. Ft. 

 Thuya plicata,Don (gigantea, 



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

 Abies pectinata, DC. ; Silver 



Fir. No. 1 of " The 



Union Trees," planted 



1707, - - - - July, „ 16 5] 5 ^104 

 Do., on stable path, April, 06 1"J l^^ 5 — — 

 Fseudotsuga Douylasii, Carr ; 



Douglas Fir, - - - „ „ 5 10| 5 — — 

 Ficea excelsa, J^. ; Spruce, - July, '07 5 Hi o — — 

 Cedrus atlantica, Manetti ; 



Atlas Cedar, - - - „ „ 5 2^ 5 — 60 

 Pinus sylvestris,\j.; Scots Fir, 



in flower garden, planted 



1707, - - - - „ „ 10 5 5 21 87* 

 Larix eurojxea, DC. ; Larch, 



near bridge, - - - June, '07 8 2. \ 5 — ■ — 



* Heisht in 19U-2. 



Notes on Richardson's Skua {Stercoran'us crepidatus, dm.). 



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 {^Megalestris catarrhacteg, L.), Pomatorhine Skua (Stercorarms 

 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 soring and autumn in most years. At Fairlie I have 

 observed it from the beginning of August till November. 



