"So the population is really small at the beginning of the season, and as … more kids grow up, then you start seeing more adult wasps out and about. Hot weather, cold bloodAnother factor that contributes to an increase in wasps in late summer is the heat. This leads to more adult wasps buzzing around during and after the warmest periods of summer, and higher turnover in nests as generations reproduce more quickly. So, it's not a figment of our imaginations: for the moment, there are more adult wasps than usual in our midst. And while adult wasps are primarily vegetarian and feed off of nectar, younger wasps need protein.

Source: CBC News August 31, 2020 21:56 UTC