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 distinctive 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 herds of hundreds if possible. Parent Graboids die while giving birth due to the fact that the Shriekers seem to eat their way out of the Graboid.