A typical chupacabra measures nearly 5-1/2 feet from its muzzle to the tip of its spiny tail, and it stands just under 4 feet tall. With their slight build and lightweight bones, most weigh close to 100 pounds. They mate rarely and only during the hottest months, with the females each producing a single egg that hatches into a tiny, dehydrated creature. The mother typically leaves helpless prey in her cave so the hatchling can immediately feed.