If they let

scientists examine it, it could be legit. If they go out of their way to prevent scientists from examining and testing it it's just another hoax.

Blood-sucking mythical creature 'found'

I tend to lean toward the "freak-of-nature coyote, or a hybrid breed with a genetic mutation" if it's not a fake, but I acknowledge that there is a very real possibility of undiscovered animal life in our world...

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