<p>Chimney swift calls are described as a twitter (Palmer and Fowler, 1975). The most common twitterings are accelerating and decelerating chipping (Chantler and Driessens, 2000).</p>  <p>Chimney swifts also are likely to use touch and vision in communication. They perceive their environment through vision, hearing, touch, and a weakly developed sense of smell.<span> (Chantler and Driessens, 2000; Palmer and Fowler, 1975)</span></p>  <p><strong>Communication Channels: </strong>visual; tactile; acoustic</p><p><strong>Perception Channels: </strong>visual; tactile; acoustic; chemical</p>