Figure 8: Velociraptor had very acute hearing which
was necessary for successful hunting.
|Hearing is important in predatory animals such as Velociraptor.
The middle-ear cavity was greatly enlarged, suggesting that these theropods
were able to hear low frequency sounds. As a group, Dinosauria were equipped
with good to excellent hearing machinery. All dinosaurs had the skull notches
to hold a taut eardrum. All dinosaurs also had middle-ear bones which were
thin and delicate, like a bird's, for picking up higher frequencies. In
the fluid-filled canals of the brain, the dinosaur's ear was rather like
a crocodile's. Since crocodiles today have the most sensitive hearing of
any reptiles, the dinosaurs were certainly tuned into a wide range of airborne