As temperatures rise in Nova Scotia, many residents are noticing an increase in blackflies compared to previous years, signaling the start of their seasonal emergence. According to Andrew Hebda, a retired zoology curator at the Nova Scotia Museum, blackflies remain dormant during winter and cold periods, becoming active in spring when the weather warms up. Hebda explained that with 10 to 14 days of warm weather, the majority of blackflies will have emerged, reproduced, and died off for the summer, as they only have one generation per year.

In contrast to mosquitoes, which can have multiple generations per season, blackflies will not reappear until the following year after reproducing. Last year’s dry conditions suppressed the blackfly population despite higher temperatures, as moisture levels were low. To avoid blackflies, it is recommended to steer clear of tall grass and wooded areas. For mosquitoes, staying in open areas with strong, steady winds can help, along with using bug sprays to mask scent or wearing bug jackets to create a physical barrier against the insects.