The longer days with plenty of sunlight and milder temperatures have slowed the activity at my bird feeders. I still get about eight kinds of birds visiting each day, but those that come by seem to ...
Image Credit: Survival World ...
Behavioral Ecology and Sociobiology, Vol. 75, No. 6 (June 2021), pp. 1-15 (15 pages) Acoustic signals are one of the reproductive isolation mechanisms that can be a driving force for speciation.