Page "Eastern gray squirrel" Paragraph 21

It has been demonstrated that the use of vocal and visual communication varies by location, based on elements such as noise pollution and the amount of open space.

For instance, populations living in large cities generally rely more on the visual signals, due to the generally louder environment with more areas without much visual restriction.

However, in heavily wooded areas, vocal signals are used more often due to the presence of less noise and a dense canopy restricting visual range.