All theropods for which there is brain-size information have surprising (to humans!) cerebral powers: their brains are every bit as large as one would expect of a crocodilian or lizard
"blown up" to the proper body size. Indeed, troodontids had the largest brains for their body size of any non-avian theropods, and were well within the bird range of inferred intelligence (see Box 12.4). This suggests that these animals probably had more complex perceptual ability and more precise motor-sensory control than some of their smaller brained brethren. It also likely implies sophisticated inter- and intraspe-cific behavior. No stegosaurs, they!
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