Animals beginning with the letter X: * X-Ray fish * X-Ray tetra * Xanclomys - a small mammal from the Paleocene of North America. * Xanthareel - yellow eel * Xantis - yak * Xantus - a bird * Xantusiidae (family of night lizards) * Xantus murrelet - a small seabird found in the California Current system in the Pacific Ocean. * Xeme - an artic fork-tailed gull. * Xenarthra - mammal in South America * Xenicidae (family of New Zealand wrens) * Xenopeltidae (family of reptiles including sunbeam snake- Xenopeltis) * Xenipirostris (genus of birds from Madagascar) * Xenops - a rain forest bird from the Americas * Xenopterygii (order of fishes including clingfishes) * Xenopus - a frog; toad * Xenurine - a species of armadillo; a cabassou. * Xenurus unicinctus - an
Animals beginning with the letter X: * X-Ray fish * X-Ray tetra * Xanclomys - a small mammal from the Paleocene of North America. * Xanthareel - yellow eel * Xantis - yak * Xantus - a bird * Xantusiidae (family of night lizards) * Xantus murrelet - a small seabird found in the California Current system in the Pacific Ocean. * Xeme - an artic fork-tailed gull. * Xenarthra - mammal in South America * Xenicidae (family of New Zealand wrens) * Xenopeltidae (family of reptiles including sunbeam snake- Xenopeltis) * Xenipirostris (genus of birds from Madagascar) * Xenops - a rain forest bird from the Americas * Xenopterygii (order of fishes including clingfishes) * Xenopus - a frog; toad * Xenurine - a species of armadillo; a cabassou. * Xenurus unicinctus - an