 "Terrestrisuchus" was a long-legged, active predator that lived entirely on land, unlike modern crocodilians.It inhabited a chain of tropical, low-lying islands that made up southern Britain, along with similarly small-sized dinosaurs and abundant rhynchocephalians.Numerous fossils of "Terrestrisuchus" are known from fissures in limestone karst which made up the islands it lived on, which formed caverns and sinkholes that preserved the remains of "Terrestrisuchus" and other island-living reptiles.