tell me name of any animal which name is starting from Alphabet X;)

I don't know if you are looking for mammals or "animals" in general. Here are some reptiles, birds, fish, mammals:

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

Yak
Zebra

Hmm - does OP mean names starting with the letter X or animal names from X to the end of the alphabet? Hmm. I can't tell.

Me either. Your answer was in depth, but I thought I'd try a different tack.

I read YOUR answer twice and then it came to me - duhh.

I thought at first that you couldn't tell the difference between X and Z. Not a surprise because I've had whole days like that!

Me too! ':I

"Starting" is one thing. Where you go afterwards is another thing...

names of animals whose names begin with letter x and letter y

Google the question - I assume this is homework?

Maybe has a new baby animal and looking for a name for it.