Bernard Castelein / Masked booby (Sula dactylatra granti) standing on rock, Genovesa, Galapagos, Ecuador, South America, endemic subspecies

Pete Oxford / Wagler's sipo (Chironius scurrulus) Yasuni National Park, Amazon Rainforest, Ecuador. South America.

Pete Oxford / Wagler's Sipo (Chironius scurrulus) juvenile, Iwokrama Rainforest Reserve, Guyana

Pete Oxford / Wagler's Sipo (Chironius scurrulus) juvenile, Iwokrama Rainforest Reserve, Guyana

Pete Oxford / Wagler's Sipo (Chironius scurrulus) flicking tongue, Rewa River, Guyana

Pete Oxford / Wagler's Sipo (Chironius scurrulus) in rainforest, Yasuni National Park, Amazon Rainforest, Ecuador

Pete Oxford / Fire snake (Chironius scurrulus) in rainforest, Rewa River, Iwokrama reserve, Guyana

Lucas Bustamante / Rusty whipsnake / Wagler's sipo (Chironius scurrulus) coiled up, close up, Yasuni National Park, Orellana, Ecuador.

Lucas Bustamante / Rusty whipsnake / Wagler's sipo (Chironius scurrulus) scales, detail, Yasuni National Park, Orellana, Ecuador.

Karine Aigner / Portrait of a juvenile Wagler's sipo (Chironius scurrulus) snake. Yasuni National Park, Ecuador. Amazon Rainforest.

Karine Aigner / Man's hand holds a juvenile Wagler's Sipo (Chironius scurrulus) snake. Yasuni National Park, Ecuador. Amazon Rainforest.