Piotr Naskrecki / Fantastic Leaf-tail Gecko (Uroplatus phantasticus) clinging to a twig, Madagascar

Pete Oxford / Black and White Ruffed Lemur (Varecia variegata variegata) in rainforest near Mantadia National Park, endangered, Madagascar

Patricio Robles Gil / Verreaux's Sifaka (Propithecus verreauxi) portrait, Berenty Private Reserve, South Madagascar

Patricio Robles Gil / Ring-tailed Lemur (Lemur catta) mother with young, Berenty Reserve, Madagascar

Patricio Robles Gil / Common Brown Lemur (Eulemur fulvus) in tree, Anjajavy, northwestern Madagascar

Patricio Robles Gil / Verreaux's Sifaka (Propithecus verreauxi) portrait, Berenty Private Reserve, South Madagascar

Patricio Robles Gil / Ring-tailed Lemur (Lemur catta), Berenty Reserve, Madagascar

Pete Oxford / Golden-crowned Sifaka (Propithecus tattersalli) portrait, critically endangered, Daraina, northeast Madagascar

Pete Oxford / Ring-tailed Lemur (Lemur catta) baby clinging to its mother's back, vulnerable, Beza Mahafaly Special Reserve, southwestern Madagascar

Pete Oxford / Ring-tailed Lemur (Lemur catta) portrait, vulnerable, Beza Mahafaly Special Reserve, southwestern Madagascar

Pete Oxford / Ring-tailed Lemur (Lemur catta) portrait, vulnerable, Beza Mahafaly Special Reserve, southwestern Madagascar

Pete Oxford / Black and White Ruffed Lemur (Varecia variegata variegata) in rainforest near Mantadia National Park, endangered, Madagascar

Pete Oxford / Black and White Ruffed Lemur (Varecia variegata variegata) in rainforest near Mantadia National Park, endangered, Madagascar

Mark Moffett / Verreaux's Sifaka (Propithecus verreauxi) in tree, Madagascar