FINAL.

Pest Identification

Information about the most common Alberta pests, and some of their misidentified counterparts. Images are not to scale.

Wasp specimen on white background

Wasps

Yellowjackets · Bald-faced Hornets · Paper Wasps

Social stinging wasps commonly encountered around Alberta homes. These species live in organized colonies, defend their nests aggressively, and are most noticeable during the warmer months.

Active: Late Spring – Early Fall
Identification
  • Live in social colonies with queens and workers
  • Nest in ground voids, wall cavities, or exposed paper nests
  • Black, yellow, or white markings with a narrow waist and folded wings at rest
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Common house and fruit flies found indoors

Flies

House Flies · Fruit Flies

Common nuisance flies encountered indoors around Alberta homes. Flies reproduce quickly when food waste, moisture, or organic material is present, but populations collapse once breeding sources are removed.

Active: Spring – Fall (indoors year-round if allowed)
Identification
  • Short life cycles with rapid reproduction tied to food or moisture sources
  • Often found near kitchens, garbage, drains, and windows
  • Presence usually indicates an underlying sanitation or moisture issue
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