Cattle Egret (Bubulcus ibis, Ardeola ibis) riding on back of a grazing sheep, Extremadura, Spain, Europe

animal animals ardeidae ardeola artiodactyla aves back bird birds bovid bovidae bovids bubulcus cattle cattle ciconiiformes day daylight daytime during egret egret egrets europe european even even toed exterior exteriors extremadura fauna grazing gregarious herd heron herons ibis kingdom mammal mammalia mammalian mammalians mammals nature nobody of on outdoor photo photos riding ruminant ruminantia ruminants sheep shot shots south southern spain spanish stand standing stands tetrapod the toed toed ungulate ungulates vertebrata vertebrate vertebrates wild wildlife world