Stephen Dalton / Mexican axolotl {Ambystoma mexicanum} albino, controlled conditions

Stephen Dalton / Common / European treefrog {Hyla arborea} jumping sequence, multiflash image, controlled conditions

Stephen Dalton / Common frog {Rana temporaria} diving into water from bank, UK, controlled conditions

Stephen Dalton / Wallace's / Abah river flying frog (Rhacophorus nigropalmatus) gliding, controlled conditions, showing use of webbed feet, from Malaysia and Indonesia

Warwick Sloss / Eggs attached to the underbelly of the male Weedy sea dragon (Phyllopteryx taeniolatus) wild-caught but filmed in captive conditions under licence, from the coast around south Australia

David Perpinan / Deformed Hermann's tortoise (Testudo hermanni). This is a common condition in Mediterranean tortoises kept in cold weathers or under inadequate husbandry. Small repro only

David Perpinan / Radiography of a captive Bearded dragon (Pogona vitticeps) with sand impaction, a common condition in captive reptiles. small repro only

David Perpinan / Stomatitis in a captive Chinese water dragon (Physignathus cocincinus). This is a common condition in captive water dragons, as they are nervous and hit themselves against glass.

David Perpinan / Beak overgrowth in Eastern box turtle (Terrapene carolina). This is a common condition in captive chelonians. Captive animal. Small repro only

David Perpinan / Dental disease in a captive Orca / Killer whale (Orcinus orca). This is a common condition in captive orcas. Small repro only

Karine Aigner / Hermit thrush (Catharus guttatus) captive during scientific study, with a wax worm. This bird is part of a study about weight gain, diet and condition prior to migration. Once the thrush has reached i...

Will Watson / Great crested newt (Triturus cristatus) male in breeding condition, amongst Soft hornwort (Ceratophyllum submersum), Herefordshire, England, UK, May. Captive.

Chris Mattison / Mandarin ratsnake (Euprepiophis mandarinus) with its eyes clouded over indicating a pre-shed condition. Captive.

Will Watson / Male Smooth Newt (Lissotriton / Triturus vulgaris) in breeding condition against Common Water Crowfoot (Ranunculus aquatilis). Captive. Herefordshire, UK, April.

Pete Oxford / Spanish Lynx (Lynx pardinus) undergoing a thorough medical check-up after having shown signs of lethargy and general loss of condition, El Acebuche Breeding Center, Matalascanas, Donana National Park,...

Ann & Steve Toon / Two Tawny owls (Strix aluco) perched on tree stump, Cumbria, UK. August. Controlled condition. Captive.