In 2011, Denver Fowler iyo asxaabtiisu waxay soo jeediyeen hab cusub oo ay dromaeosaurs sida Velociraptor iyo dromaeosaurs la mid ah ay qabsan karaan oo xakameyn karaan ugaarsiga. Qaabkan, oo loo yaqaan "Raptor prey restraint" (RPR) qaabka ugaarsiga, wuxuu soo jeedinayaa in dromaeosaurs ay dileen ugaartooda si aad u la mid ah shimbiraha wax duqeeya ee hadda jira: iyagoo ku boodaya miisaankooda, iyagoo hoos u dhigaya culeyska jirkooda, oo ay si adag ugu qabsanayaan calaacalahooda waaweyn, ee foornada u eg.
qaab dhismeedka