Jersey cows on a farm in the Yorkshire Dales near Bainbridge, Yorkshire, England, United Kingdom, Europe

sorting out reindeer in pen before going to market

Satellite Tag attached to Giant Manta Ray, Ecuador. The lines to the left indicate recent fishing damage. Pacific Ocean, Ecuador

tagging reindeer

tagging reindeer

Curious Holstein cows looking at the camera while standing in a fenced area with identification tags in their ears on a robotic dairy farm, North of Edmonton, Alberta, Canada

A single calf tagged 162 looking straight at you cropped tightly; Eastend, Saskatchewan, Canada

Curious Holstein cows looking at the camera while standing in a fenced area with identification tags in their ears on a robotic dairy farm, North of Edmonton, Alberta, Canada

A group of calves with ear tags looking at the camera; Eastend, Saskatchewan, Canada

A calf tagged 26 stands alone amongst a group; Eastend, Saskatchewan, Canada

Close-up of two diary cows in an alpine meadow with snow-capped mountains in the background, San Candido, Bolzano, Italy

Cattle stand in a row along a ridge overlooking a rocky beach below and blue sky; Cornwall County, England

Holstein cow looking out of a milking stall waiting to be milked using automated milking equipment on a robotic dairy farm, North of Edmonton, Alberta, Canada

Close-up of a cute brown goat's (Capra aegagrus hircus) head with a yellow tag on it's ear, Waupoos, Ontario, Canada

Holstein cow looking out of a milking stall waiting to be milked using automated milking equipment on a robotic dairy farm, North of Edmonton, Alberta, Canada