While earlier studies had suggested that Deinonychus had a comparatively weak jaw and might have used saw motion bites, like the modern Komodo dragon, a 2010 study analyzing actual Deinonychus tooth puncture marks in the bones of a Tenontosaurus found the bite force of Deinonychus to be between 4,100 and 8,200 newtons--equivalent to a similarly sized alligator.

A study published in November 2018 indicates that Deinonychus laid blue eggs like today's emus. The study also indicates that Deinonychus and other dinosaurs that created open nests likely represent an origin of color in modern bird eggs as an adaptation both for recognition and camouflage against predators.

The skull was equipped with powerful jaws lined with around seventy curved, blade-like teeth.