Risa tridactyla Ornithology Ornithological illustration Drawing depicting: Larus tridactyla -- Black-legged Kittiwake. Alternate name on piece: Risa tridactyla [Kittiwake] Rough charcoal and pencil layout sketch; position of one head changed in published plate. Gould, John , 1804-1881 (artist) Richter, Henry Constantine , 1821-1902 (artist) 1869 StillImage electronic image/tiff ku-gould:20313 https://digital.lib.ku.edu/ku-gould/20313 Gould 513 Birds of Great Britain--https://digital.lib.ku.edu/ku-gould/8005--Ellis Aves H131 This work is free of known copyright restrictions.