LIMITATIONS:
1> Sensitive to Cold: It makes them sluggish and slower moving
2> Sensitive to heat attacks: Any heat or fire attacks are given +1CS effectiveness when their hood is up, +3 CS when hit directly

After an indeterminate time spent living underground, a Graboid surfaces and undergoes a gory metamorphosis: It divides into 3 to 6 Shriekers — fast-moving, lion-sized bipeds.

Though Shriekers, like Graboids, are technically blind, they can track their prey by sensing infrared radiation. They are especially sensitive to temperatures between 97 and 107 degrees F. — the normal range for mammalian body heat.

These extremely dangerous creatures reproduce hermaphroditically — in effect, each Shrieker is "born" pregnant. Shriekers' ability to reproduce is limited only by their access to food. Once a Shrieker has eaten enough food, it disgorges a new, ravenously hungry Shrieker. Consequently, it is crucial that Shriekers be prevented from getting to plentiful food.

Shriekers' prolific reproductive skills make them so dangerous that the U.S. government has decreed they are not a protected species, and should be killed on sight.

SAFETY TIP: If you encounter a Shrieker in the wild, do anything possible to mask your body heat. Thermally insulated blankets are effective camouflage against a Shrieker's infrared senses, but be certain to cover yourself entirely. Your exhaled breath can be a fatal giveaway if the ambient temperature differs from your body's internal temperature.