Final answer:
It is false that most bird species can't hear well; their effective communication through calls plays a key role in natural selection and survival.
Step-by-step explanation:
False, birds do tend to have good hearing abilities. Birds make aural signals such as calls, with communication playing a significant role in their survival. For example, biologists have found that small birds may use specific calls to warn of predator presence, which are not detectable by larger predator birds, providing them with a survival advantage. This supports the idea that birds' ability to communicate effectively affects natural selection. In terms of hearing ranges, different species have different audible ranges, suggesting that most birds are not impaired in their hearing but are instead adapted to their ecological niches. An example is the predators with excellent hearing that can hunt using auditory cues alone.