Juergen Freund / Wildlife carer Margit Cianelli with juvenile Lumholtz kangaroo (Dendrolagus lumholtzi) with radio collar. The tree kangaroo has a radio collar to allow her to explore her forest surroundings ready for...

Juergen Freund / Margit Cianelli wildlife carer with young Lumholtz kangaroos (Dendrolagus lumholtzi), one with a radio collar. The tree kangaroo has a radio collar to allow her to explore her forest surroundings read...

Nick Garbutt / Pack of wolves (Canis lupus). Yellowstone National Park, Wyoming, USA. January.

Hugh Pearson / Leopard (Panthera pardus) resting, Erindi Game Reserve, Namibia.

Mark Taylor / Black, and Black and white tuxedo male kittens, Tuxie and Buxie, 3 months lying together, wearing collars and bells.

Ross Hoddinott / 2020VISION / New planting of young sapling English Oak tree (Quercus robur) in protective plastic ‘collar', Feanedock Wood, The National Forest, Derbyshire, UK, November 2010.

Ross Hoddinott / 2020VISION / New planting of young sapling trees in protective plastic collars, Feanedock Wood, The National Forest, Derbyshire, UK, November 2010.

Richard Du Toit / Two Lionesses fitted with radio tracking collars {Panthera leo} Chobe NP, Botswana

Nick Upton / Spanish mastiff guard dog (Canis domesticus) wearing a metal spiked carlanca collar to protect it from wolves, protecting a herd of sheep on pastureland above the Lakes of Covadonga, Asturias, Spain,...

TJ Rich / Black cockpoo sitting. Wiltshire, UK

TJ Rich / Jack Russell Terrier sitting, rescue dog, Wiltshire, UK

TJ Rich / Jack Russell Terrier, Wiltshire, UK