Schwimmer concluded in 2002 that the feeding patterns of Deinosuchus most likely varied by geographic location; the smaller Deinosuchus specimens of eastern North America would have been opportunistic feeders in an ecological niche similar to that of the modern American alligator.
Schwimmer konkluderede i 2002 at ædemønstret af Deinosuchus nok muligvis afhang af dens geografiske udbredelse; de mindre Deinosuchus i den østlige del af Nordamerika ville have været opportunister i en økologisk niche svarende nogenlunde til moderne amerikanske alligatorer.