Georgette Douwma / Black brittlestar / Variable brittlestar (Ophiomastix variabilis). West Papua, Indonesia.

Georgette Douwma / Black brittlestar / Variable brittlestar (Ophiomastix variabilis). West Papua, Indonesia.

Joao Burini / Caninana (Spilotes pullatus) Parque do Zizo Private Reserve, Sao Paulo, Atlantic Forest South-East Reserves UNESCO World Heritage Site, Brazil.

Alex Mustard / Variable jawfish (Opistognathus variabilis) emerging from its hole in the sea bed, close to a coral reef. Ambon Bay, Ambon, Maluku Archipelago, Indonesia. Banda Sea, tropical west Pacific Ocean.

Lucas Bustamante / Yellow rat snake (Spilotes pullatus) portrait, Otongachi, Santo Domingo de los Tsachilas, Ecuador.

Alex Hyde / Blister beetle (Mylabris polymorpha) Nordtirol, Austrian Alps, July.

Cyril Ruoso / Poison dart frog (Ranitomeya variabilis) 1000m altitude, Tarapoto, Amazon, Peru

Cyril Ruoso / Poison dart frog (Ranitomeya variabilis) 1000m altitude, Tarapoto, Amazon, Peru

Andy Sands / Variable oysterling (Crepidotus variabilis) growing on dead twig, Hertfordshire, England, UK, October

Andy Sands / Variable Oysterling (Crepidotus variabilis) group growing on end of dead log, Hertfordshire, England, UK, October . Focus stacked image

Chien Lee / Frog (Oreophryne variabilis), Sulawesi, Indonesia

Doug Wechsler / American dog tick (Dermacentor variabilis) adult female, PA, Morris Arboretum, Philadelphia, Pennsylvannia, USA, June.