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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 armadillo native of the tropical parts of South America.  
Xerus - a type of ground squirrel from Africa  
Xiphias - a swordfish.  
Xiphias gladius  
Xiphosuran - a horseshoe crab.  
Xoloitzcuintli - a dog  
Xoni - mystical creature.  
Xylophone Cat- A cat that is only by legend but some claim to have seen it.  
 
Dinosaurs 
 
 
 
Xenoposeidon  
Xenotarsosaurus  
Xiaosaurus  
Xinjiangovenator  
Xuanhanosaurus  
Xuanhuaceratops  
Xuanhuasaurus  
 
 
 
 
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 armadillo native of the tropical parts of South America.  
Xerus - a type of ground squirrel from Africa  
Xiphias - a swordfish.  
Xiphias gladius  
Xiphosuran - a horseshoe crab.  
Xoloitzcuintli - a dog  
Xoni - mystical creature.  
Xylophone Cat- A cat that is only by legend but some claim to have seen it.  
 
Dinosaurs 
 
 
 
Xenoposeidon  
Xenotarsosaurus  
Xiaosaurus  
Xinjiangovenator  
Xuanhanosaurus  
Xuanhuaceratops  
Xuanhuasaurus  
 
 
There are a few animal names beginning with X,
     
     
    
    
    
    
    
    
  
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