Nature Picture Library offers the best nature photographs and footage from the world's finest photographers, to license for commercial and creative use. More than 700,000 images and video clips online, from tigers to turtles and elephants to sharks.
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Gerrit Vyn / Singing adult Cassin's Sparrow (Aimophila cassinii). Cimarron National Grassland, Kansas, USA, April.
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Gerrit Vyn / Adult Cassin's Sparrow (Aimophila cassinii). Cimarron National Grassland, Kansas, USA, April.
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Rolf Nussbaumer / Male Cassin's Sparrow (Aimophila cassinii) singing in bush, Choke Canyon State Park, Texas, USA. April 2002
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Rolf Nussbaumer / Cassin's Sparrow (Aimophila cassinii), Starr County, Rio Grande Valley, Texas, USA. May 2002
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Alan Murphy/ BIA / Cassin's Sparrow (Aimophila cassinii) calling from cactus, Texas
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Alan Murphy / Cassin's Sparrow (Aimophila cassinii) calling, Texas
