Matthias Breiter / Taiga forest and Mount Sanford, Wrangell-St. Elias National Park, Alaska

Nick Garbutt / Male Sanford's brown lemur (Lemur fulvus sandfordi) portrait, Mt d'Ambre NP, North Madagascar

Nick Garbutt / Male Sanford's brown lemur (Lemur fulvus sanfordi) Mt d'Ambre NP, Madagascar

Pete Oxford / Sandford's brown lemur (Lemur fulvus sandfordi) lying on branch, Ankarana Reserve, Madagascar

Pete Oxford / Sanford's brown lemur (Eulemur fulvus sacfordi) as child's illegal pet, near Ambilobe, Madagascar

Pete Oxford / Sanford's brown lemur (Eulemur fulvus sanfordi) Male, Ankarana Special Reserve. Northern MADAGASCAR, endemic

Pete Oxford / Sanford's brown lemur (Eulemur fulvus sanfordi) Male, Ankarana Special Reserve. Northern MADAGASCAR, endemic

Pete Oxford / Sanford's Brown Lemur (Eulemur fulvus sanfordi) female, Ankarana Special Reserve, northern Madagascar

Pete Oxford / Sanford's Brown Lemur (Eulemur fulvus sanfordi) female portrait, Ankarana Special Reserve, northern Madagascar

Pete Oxford / Sanford's Brown Lemur (Eulemur fulvus sanfordi) male portrait, Ankarana Special Reserve, northern Madagascar

Pete Oxford / Sanford's Brown Lemur (Eulemur fulvus sanfordi) male portrait, Ankarana Special Reserve, northern Madagascar

Pete Oxford / Sanford's Brown Lemur (Eulemur fulvus sanfordi) male portrait, Ankarana Special Reserve, northern Madagascar

Rod Williams / Sanford's brown lemur {Eulemur fulvus sanfordi} male, captive, from Mount d'Ambre, Madagascar

Rod Williams / Sanford's brown lemur {Eulemur fulvus sanfordi} captive, from Madagascar

Rod Williams / Sanford's brown lemur {Eulemur fulvus sanfordi} captive from Madagascar

Rod Williams / Sanford's brown lemur male {Eulemur fulvus sanfordi} Mount D-Ambre, Madagascar

Lynn M Stone / Sanford's brown lemur (Lemur fulvus sanfordi) feeding on fruit, captive, from Madagascar