Bird Calls May Have Meaning, ScienceDaily Bookmark and Share

Excerpts: A deep-voiced black-capped chickadee may wonder why other birds ignore it, but there may be a good reason behind the snub, says a University of Alberta study that looked into how the bird responds to calls. (...) modified the black- capped chickadee calls, played those sounds back to the bird and observed how they reacted. They found that the chickadee relies on several acoustic features including pitch, order of the notes and rhythm of the call. They also rejected the calls of the control bird, the gray-crowned rosy finch, in favour of their own species. (...)