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.

Researchers have found that female red squirrels showed high levels of multimale mating and would even mate with males that had similar genetic relatedness, basically mating with their relatives.

A male red squirrel approaches a female during her mating chase. Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing ...

[Mark Makela/The Daily Pennsylvanian] A squirrel gnaws on food on College Green. About 250 squirrels are removed from campus buildings each year -- including dormitories and the president's house.