双冠龙科恐龙都有着大型、独特的头冠。这些头冠曾被提出过多种功能,如吸引异性和威吓敌人。这些头冠还被提出过是两性异形的特征,但有着争议。双冠龙科另一个鲜明的颅内特点是颌骨和上颌骨,这让它们有着与鳄鱼同样的外观缺口。这特征让一些人,如David B. Norman(英语:David B. Norman)猜想双脊龙科的前牙对捕捉猎物来说相对较弱,推测它们为食腐动物。犹他州发现的脚印踪迹显示出双冠龙科可能可以游泳,这意味着它们以鱼类为食。[5]
^Holtz, Thomas R. Jr. (2012) Dinosaurs: The Most Complete, Up-to-Date Encyclopedia for Dinosaur Lovers of All Ages,Winter 2011 Appendix. (页面存档备份,存于互联网档案馆)
^Holtz, Tom. Dilophosaurs. Palaeos. [22 November 2013]. (原始内容存档于2019-10-22).
^Charig, A.J. and Milner, A.C. (1990). "The systematic position of Baryonyx walkeri, in the light of Gauthier's reclassification of the Theropoda." In Carpenter, K. and Currie, P.J. (eds.), Dinosaur Systematics: Perspectives and Approaches, Cambridge University Press: 127-140.
^Smith, N.D., Makovicky, P.J., Pol, D., Hammer, W.R., and Currie, P.J. (2007). "The dinosaurs of the Early Jurassic Hanson Formation of the Central Transantarctic Mountains: Phylogenetic review and synthesis." In Cooper, A.K. and Raymond, C.R. et al. (eds.), Antarctica: A Keystone in a Changing World––Online Proceedings of the 10th ISAES, USGS Open-File Report 2007-1047, Short Research Paper 003, 5 p.; doi:10.3133/of2007-1047.srp003.