Ants

• Common Species in Victoria:
  • Argentine ants (an invasive species)
  • Black house ants
  • Coastal brown ants
  • Bull Ants
  • Sugar Ants
  • Fire Ants
  • Green Tree Ants
• Risks: Contaminate food and surfaces; some species cause structural damage.
• Control Measures: Baits, Pest control and sealing entry points.

• Argentine Ants (Linepithema humile)

  • Description: Small (2.5-3 mm), light to dark brown ants, highly invasive and aggressive towards other ant species.
  • Habitat: Thrive in urban areas, gardens, and homes; prefer warm and moist environments.
  • Damage:
    • Invade kitchens and food storage areas, contaminating food.
    • Displace native ant species and disrupt local ecosystems.
  • Preventative Methods:
    • Seal cracks and crevices in walls and floors.
    • Keep food storage areas clean and store food in airtight containers.
    • Remove sugary spills immediately, as they attract these ants.
  • Fun Fact: Argentine ants can form “supercolonies” where billions of ants from different nests cooperate, making them one of the most expansive insect networks on Earth.
  2. Black House Ants (Ochetellus glaber)
  • Description: Shiny, black ants measuring around 2.5-3 mm.
  • Habitat: Found in walls, gardens, and under stones; commonly enter homes for food.
  • Damage:
    • Contaminate food and surfaces.
    • Known to invade in large numbers, causing nuisance infestations.
  • Preventative Methods:
    • Ensure all bins are tightly sealed.
    • Remove outdoor food sources, such as pet food, regularly.
    • Fix leaking taps and pipes to reduce moisture.
  • Fun Fact: Despite their tiny size, black house ants can travel up to 30 meters from their nests in search of food. 
  3. Coastal Brown Ants (Pheidole megacephala)
  • Description: Light to dark brown ants, with larger “soldier” ants that have distinctive large heads.
  • Habitat: Nest in soil, lawns, under paving stones, and walls.
  • Damage:
    • Displace native ants and other small invertebrates.
    • Can damage lawns and gardens by disturbing the soil.
  • Preventative Methods:
    • Regularly inspect and repair paving and garden beds to eliminate nesting sites.
    • Use ant bait stations to reduce colonies.
  • Fun Fact: Coastal brown ants are known for their aggressive behavior toward other ant species, often dominating an area entirely.
  4. Bull Ants (Myrmecia spp.)
  • Description: Large ants (15-40 mm) with powerful jaws and a venomous sting. Colors range from reddish-brown to black.
  • Habitat: Nest in soil, rotting logs, or under rocks, often in bushland or suburban gardens.
  • Damage:
    • Painful stings can cause allergic reactions in humans and pets.
    • Protect their nests aggressively, making them a hazard in gardens.
  • Preventative Methods:
    • Avoid leaving rotting wood or logs in gardens.
    • Wear gloves when gardening in areas prone to bull ants.
    • Professional pest control may be needed to safely remove nests.
  • Fun Fact: Bull ants have excellent eyesight and can see movement up to a meter away, a rarity among ants.
  5. Sugar Ants (Camponotus spp.)
  • Description: Medium-sized ants (5-15 mm) with an orange-brown thorax and dark head and abdomen.
  • Habitat: Found in soil, tree stumps, and under rocks; attracted to sweet substances indoors.
  • Damage:
    • Invade kitchens to feed on sugary foods and drinks.
    • May tunnel through wood to create nests, causing minor structural damage.
  • Preventative Methods:
    • Clean up sugary spills and crumbs immediately.
    • Store sweet foods in sealed containers.
    • Reduce outdoor lighting at night, which attracts these ants.
  • Fun Fact: Sugar ants are nocturnal and are most active during the night, especially around artificial light sources.
  6. Fire Ants (Solenopsis spp.)
  • Description: Small (2-6 mm), reddish-brown ants with a painful sting; an invasive species.
  • Habitat: Prefer open, sunny areas such as lawns, gardens, and pastures.
  • Damage:
    • Inflict painful stings that can cause severe allergic reactions.
    • Destroy crops and damage electrical equipment by nesting inside.
  • Preventative Methods:
    • Report sightings to local authorities, as they are a biosecurity threat.
    • Avoid disturbing fire ant mounds, as they respond aggressively.
  • Fun Fact: Fire ants are excellent swimmers and can form floating colonies to survive floods.
  7. Green Tree Ants (Oecophylla smaragdina)
  • Description: Bright green ants with a slender body, known for building nests by weaving leaves together.
  • Habitat: Found in trees and shrubs, mainly in warmer regions but occasionally seen in Victoria.
  • Damage:
    • Rarely cause direct damage to homes but may bite when disturbed.
    • Can overrun gardens and harm native insect populations.
  • Preventative Methods:
    • Trim trees and shrubs that are close to the house.
    • Avoid disturbing their nests in trees.
  • Fun Fact: Green tree ants use silk produced by their larvae to “weave” leaves together into nests, demonstrating remarkable cooperation.

  Key Takeaways for Ant Control in Victoria

  • General Prevention:
    • Seal all possible entry points in your home, including gaps around doors, windows, and utility lines.
    • Maintain cleanliness and promptly dispose of food waste.
    • Regularly inspect and maintain garden areas to deter nesting.
  • When to Call Professionals:
    • If an ant infestation persists despite DIY efforts.
    • For invasive species like Argentine or fire ants that pose significant risks.