Ants
European Fire Ant
An invasive, reddish-brown ant that stings aggressively when its nest is disturbed. It is spreading in parts of Ontario through lawns, gardens and moved soil.
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Quick facts
- Size
- 4–5 mm
- Colour
- Reddish-brown
- Active season
- Spring to fall
- Where found
- Lawns, gardens, under stones and logs, moist soil
How to Identify
- Small reddish-brown ant with two bumps between the thorax and abdomen
- Two small backward-pointing spines on its back
- Many workers swarm and sting quickly when disturbed
Signs to Look For
- Large numbers of ants in lawns, gardens and under pots or stones
- Painful stings while gardening or playing in the yard
- Very high ant numbers — colonies have many queens
Why It Matters
- Painful stings that can cause swelling; allergic reactions are possible
- Make yards and gardens hard to use
- Spread easily through moved soil, mulch and potted plants
Prevention Tips
- Avoid moving soil, mulch or potted plants from infested areas
- Reduce moisture and leaf litter near the house
- Wear gloves and closed footwear when gardening in affected areas
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