Sylvain Cordier / Man treating invasive plant with herbicide around Laysan abatross (Phoebastria immutabilis), colony on Eastern island, a man treats the Golden Crown-beard (Verbesina encelioides), Midway Atoll Nationa...

Nick Upton / Adult male Grey seal (Halichoerus grypus) 'Flipper' touching nose to target stick while keeper Kate Owen treats a grazed tail with antibiotic spray. Gweek, Cornwall, UK, November. Model released.

Pete Oxford / Roadside bakery, Nagaland, North East India, October 2014.

Petra Wegner / Jack Russell Terrier, puppy bitch standing, aged 9 weeks with treat.

Jane Burton / Owner treats 8-week kitten 'Red' with flea spray, offspring of 'Pansy'

Petra Wegner / Australian Shepherd dog, red-tricoloured, with intelligence game, searching for treats under pylons

Mark Taylor / Grey squirrel (Sciurus carolinensis) infant, climbing on wicker basket full of Easter eggs.

Mark Taylor / Two Grey squirrels (Sciurus carolinensis) infants, climbing on wicker basket full of Easter eggs.

Doug Gimesy / Male Conservation detector dog, from Skylos Ecology, training on obstacle course, stopping and waiting for treats from dog handler, Victoria, Australia. February, 2022. Model released.

Doug Gimesy / Conservation detector dogs, from Skylos Ecology, being feed treats from dog handler after training exercises. Victoria, Australia. February, 2022. Model released.

Loic Poidevin / Goat on farmhouse window sill. This goat lives free range on the farm and often climbs into the window for treats. Vendee, France, May

Bruno D'Amicis / Man selling local sweet known as 'cucurucho' traditionally wrapped in palm leaves, near Baracoa, Cuba. March 2019.