A line art drawing of an Arctic Tern by Bob Hines for the US Fish and Wildlife Service. Source URL:http://www.fws.gov/pictures/lineart/bobhines/arcticterns.html
北極燕鷗1
animal、bird、Encouraging、fws、fws lineart、line art、nature、paradisaea、sterna、sterna paradisaea、waterbird
動物、鳥、鼓舞人心的、光、燈襯裡、線條藝術、性質、paradisaea、燕鷗、胸骨paradisaea、水鳥
資料來源：openclipart ( https://openclipart.org/ )