It is said that the most dangerous creature in the Mojave Wasteland isn't the biggest thing however. It is actually one of the smallest.
It is a Chimire. (Pronounced She-Meer). It's a Chihuahua, that migrated over the Rio Grande from mexico, trying to escape irradiated heat. As some of the chihuahuas made it out safe, quite a few made it out deformed and mutated.
The Chimire is the mutated mix of a Mirelurk King and a Chihuahua. A snapping turtle and chihuahua convulsed together in the radiated mass and created what we call the Chimire. It looks just like a Chihuahua, except with mirelurk kind scales in place of fur. They have webbed feet, and let out a HORRIBLE sonic boom. (Power of a Chihuahuas bark, and a Mirelurk Kings screech make a horrible sonic boom) The Chimire, can sense you about a day before you actually encounter one. They migrate across the Wasteland when they hear a large enough prey.
When they open their wingspan they have webbed arms. Signs of fur as still sticking out from some scales.
Chimires are very horrible creatures.