Ross Hoddinott / Grizzled skipper butterfly {Pyrgus malvae}, Dorset. UK

Robert Thompson / Large grizzled skipper butterfly (Pyrgus alveus) French Pyrenees. May

Robert Thompson / Oberthur's grizzled skipper (Pyrgus armoricanus) on plantain flower, South of Casteil, French Pyrenees, France. May

Robert Thompson / Large grizzled skipper (Pyrgus alveus) on Bedstraw (Galium sp), Fillols, Pyrenees Orientales, south west France. May.

Sandesh Kadur / Grizzled giant squirrel (Ratufa macroura) feeding, Cauvery Wildlife Sanctuary, Karnataka, India.

Sandesh Kadur / Grizzled giant squirrel (Ratufa macroura) Cauvery Wildlife Sanctuary, Karnataka, India.

Sandesh Kadur / Grizzled giant squirrel (Ratufa macroura) on tree trunk, Karnataka, Western Ghats, India.

Sandesh Kadur / Grizzled giant squirrel (Ratufa macroura) on tree trunk, Karnataka, Western Ghats, India.

Sandesh Kadur / Sri Lankan giant squirrel (Ratufa macroura) portrait, Karnataka, Western Ghats, India.

Robert Thompson / Oburthers grizzled skipper (Pyrgus armoicanus) resting on orchid, Santa Caterina di Valfurva, Alps, Italy

Lorraine Bennery / Oberthur's grizzled skipper (Pygrus armoricanus) and Wood white butterfly (Leptidea sinapis) puddling, Grands Causses Regional Natural Park, France, May.

Enrique Lopez-Tapia / Thomas's Langur (Presbytis thomasi), animal endemic to northern Sumatra. These primates have relatively long arms and legs, adapted for an acrobatic life in the crowns of trees. Gunung Leuser National...