Understanding the Impact of Blackfly Season in Nova Scotia
The hopeful silver lining to a bad blackfly season in Nova Scotia

Image: Cbc
This year's blackfly season in Nova Scotia has seen an early emergence due to warmer temperatures, leading to increased sightings. However, experts suggest this could be beneficial as blackflies reproduce only once a year, potentially reducing their presence for the remainder of the summer.
- 01Blackflies are emerging earlier than usual this year due to warmer weather in Nova Scotia.
- 02Andrew Hebda, a retired curator of zoology, noted that blackflies have only one generation per year, unlike mosquitoes which can have multiple generations.
- 03The rapid emergence of blackflies means they will reproduce quickly and then die off, possibly leading to fewer blackflies later in the summer.
- 04Last year's dry conditions helped suppress blackfly populations despite warmer temperatures.
- 05To avoid blackflies, it is recommended to stay away from tall grass and wooded areas, while mosquitoes can be avoided by staying in open areas with wind.
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The blackfly season in Nova Scotia has been notably impacted by recent warm weather, causing these insects to emerge more quickly than in previous years. According to Andrew Hebda, a retired curator of zoology at the Nova Scotia Museum, blackflies typically remain dormant during winter and cold spells, only to emerge in the spring. This year, their emergence is accelerated, but there is a silver lining: blackflies reproduce only once annually. Hebda explains that if the warm weather continues for about 10 to 14 days, most blackflies will have emerged and reproduced, leading to their disappearance for the summer. This contrasts with mosquitoes, which can have up to six generations in a single season and thrive in moist conditions. Last year’s dry summer helped suppress blackfly populations despite the warmth. To minimize encounters with blackflies, it is advised to avoid tall grass and wooded areas. For mosquitoes, staying in open areas with steady winds is recommended. Additionally, using bug sprays or wearing bug jackets can provide further protection against these pests.
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The early emergence of blackflies may lead to a shorter season of discomfort for Nova Scotians, potentially reducing the nuisance caused by these insects later in the summer.
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