A professor’s hunch is that birds are saying much more in warning of danger than previously suspected, and that other animals have evolved to understand the signals.
Source: When Birds Squawk, Other Species Seem to Listen – NYTimes.com
A professor’s hunch is that birds are saying much more in warning of danger than previously suspected, and that other animals have evolved to understand the signals.
Source: When Birds Squawk, Other Species Seem to Listen – NYTimes.com
