Sinosauropteryx
"Sinosauropteryx" was a small bipedal theropod, noted for its short arms, large first finger (thumbs), and long tail. The taxon includes some of the smallest known adult non-avian theropod specimens, with the holotype specimen measuring only in length, including the tail. However, this individual was relatively young. The longest known specimen reaches up to in length, with an estimated weight of .
Specimens of Tyrannosaurus
In 1988, local rancher Kathy Wankel discovered another "Tyrannosaurus rex" in Hell Creek sediments on an island in the Charles M. Russell National Wildlife Refuge of Montana. This specimen was excavated by a team from the Museum of the Rockies led by paleontologist Jack Horner, with assistance from the U.S. Army Corps of Engineers. The specimen, given the number MOR 555 but informally called the "Wankel rex," includes approximately 46 percent of the skeleton, including the skull, as well as what at the time was the first complete "T. rex" forelimb. It has a recently estimated length of around 11.6 meters (38 ft) and a weight between and in newer figures, being the average estimate. It was long on exhibit at the Museum of the Rockies in Bozeman, Montana. Casts of MOR 555 are on display at the National Museum of Scotland, the Australian Fossil and Mineral Museum, and the University of California Museum of Paleontology. A bronze cast of the specimen, known as "Big Mike", stands outside the Museum of the Rockies.