John Cancalosi / Feral Burro / Donkey foal (Equus asinus) head portrait lying in long grass, Custer State Park, South Dakota, USA

John Cancalosi / Feral Burro / Donkey (Equus asinus) female and foal, portrait standing in long grass, Custer State Park, South Dakota, USA

Doug Wechsler / Black water stream in rainforest Burro Burro River, Guyana, South America

Doug Wechsler / Black water stream in rainforest, Burro Burro River, Guyana, South America

Jack Dykinga / Feral donkies (Equus asinus) surviving along the lower Colorado River drainage. Periodic attempts to control their numbers have had mixed success. Cibola National Wildlife Refuge, Arizona, USA.

Jeff Foott / Donkey (Equus asinus) group, Death Valley National Park, California

Jeff Foott / Donkey (Equus asinus) pair, Death Valley National Park, California

Konrad Wothe / Donkey (Equus asinus), Alps, France

Daniel Heuclin / Wild burro (Equus asinus) Panamint Mountains . Death Valley National Park, California, June

Tom Vezo / Donkey (Equus asinus), Gammons Gulch, Arizona

Carol Walker / Burro (Equus asinus), Dreamcatcher Horse and Burro Sanctuary, California, USA

Carol Walker / Burro (Equus asinus), Dreamcatcher Horse and Burro Sanctuary, California, USA