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VICTORIA COUNTY, Texas - Just like Bigfoot, stories about the mysterious chupacabra have been circulating for decades.

A south Texas couple says they have proof the legendary creature exists.

Doug and Lucy Ohrt says their grandson shot and killed a chupacabra on their ranch in Victoria County Sunday night. But a wildlife biologist says it's more likely the creature is an animal with mange.

"My grandson ran and got the gun and shot it at 240 yards, and my grandchildren said, 'oh that's a chupacabra," said Lucy Ohrt.

"They're a mythical creature that most people see but what it really is sarcoptic mange which is caused by a mite that bites the animal and it can be pretty much on any mammal," said wildlife biologist Josh Turner.

Wildlife officials say they get quite a few calls from people saying they've spotted a chupacabra. The name means goat sucker, and the creature is said to suck the blood of livestock.