 While it generally remains controversial , evidence does exist that supports the theory that at least some tyrannosaurids were social . In British Columbia 's Wapiti Formation , a trackway composed of the footprints of three individual tyrannosaurids ( named as the ichnogenus " Bellatoripes fredlundi " ) was discovered by a local outfitter named Aaron Fredlund and described in the journal PLoS One by Richard McCrea et al . An examination of the trackway found no evidence of one trackway being left long after another had been made , further supporting the hypothesis that three individual tyrannosaurs were traveling together as a group . Further research revealed the animals were traveling at a speed of between 3 @.@ 9 and 5 @.@ 2 mph and likely had a hip height of around 7 to 9 feet . As three different genera of tyrannosaurids ( Gorgosaurus , Daspletosaurus , and Albertosaurus , respectively ) are known from the formation , it is unknown which genus was the maker of the trackway . 
