Shrieker (Tremors)

Shriekers are the bipedal-second stage of the Graboid, a worm-like reptilian creature with similar features. Unlike a Graboid, Shriekers have flaps of tissue that detect thermal signatures of their prey- they are deaf.

Physiology
Shriekers are much smaller than the Graboids, about 5 feet long and 4 feet tall, though despite this they have great strength. Shriekers are very agile and can run up to 25 mph or faster (speculation), on three-toed feet and stubby legs. The Shriekers have distictive patches of red on their necks and tails, as well as the inside of their mouths. Born in 'litters' of three, Shriekers are very social, living in huge herd of hundreds if possible. Parent Graboids die while giving birth due to the fact the the Shriekers seem to eat their way out of the Graboid.

They have flaps for infrared detection on their heads, though these do not have to be fully open to function. It was said in a Stampede Entertainment FAQ that this is similiar to opening eyes wide. This also enable communication, which they achieve by letting out heat in screams.

Shriekers have long prehensile tounges that they use to manipulate objects such as door handles. The tongue is about three feet long, and covered in bristles. It is capable of distinguishing between foodstuffs and other materials.

Intelligence
Shriekers have been shown to create novel ways to beat problems, such as climbing over each other to reach prey out of their normal grasp. However, they seem to be generally governed by an instinctual desire to attack hot things.

Reproduction
When shriekers consume sufficient food, for exampel MREs, people or chickens, they reproduce asexually, and the new, smaller shrieker is dropped from the mouth.

Development
The Shriekers molt and develop into the Ass-Blaster, a lankier version that combusts chemicals produced in its rear to fly through the air.