Artist's reconstruction of Timurlengia euotica, an early relative of Tyrannosaurus rex whose keen hearing probably made it an effective predator. (sciencemag.org)
But don't scare them off: These birds have keen hearing and superb eyesight. (timesunion.com)
Their hair - trigger response has been chalked up to a sharp sense of smell and keen hearing. (sciencemag.org)