Sergey Gorshkov / Musk ox (Ovibos moschatus) portrait, Wrangel Island, Far Eastern Russia, March.

Philippe Clement / Poitou donkey (Equus africanus asinus) with shaggy coat on the island Ile de Re, Charente-Maritime, France

Petra Wegner / Tibetan terrier, sitting, portrait

Mark Taylor / Yorkshire Terrier, lying with chin on the floor.

Petra Wegner / Group portrait of five dogs sitting, from left to rt: two mongrels, Rough Collie, Bobtail (Old English Sheepdog) and longhaired Chihuahua.

Petra Wegner / Bobtail / Old English Sheepdog, sitting alongside a longhaired Chihuahua, tan and white coated.

Kristel Richard / Head portrait of a Classic pony stallion (Equus caballus) and one of his mares, in Auvergne, France.

Kristel Richard / Head portrait of a rare grey Yorkshire Dales gelding (Equus caballus) with long mane, at Glanusk Estate, Wales, UK

Niall Benvie / Head portrait of Highland cow, Scotland, with tiny frond of bracken at corner of mouth, UK

Mark Bowler / Minature Shetland Pony {Equus caballus} in snow, UK

Ross Hoddinott / Shaggy Ink Cap (Coprinus comatus) Devon. UK

Pete Oxford / Aye-aye (Daubentonia madagascariensis) one of the more bizarre mammals in the world, their peculiar features include huge ears, bushy tail, long shaggy coast, rodent-like teeth and a skeletal 'probe-l...