Odorous House Ant (Tapinoma sessile)

Smells Like Rotten Coconut • Moisture-Loving • Major CT Kitchen Pest

Odorous House Ant – Connecticut Identification & Behavior Guide

The odorous house ant is one of the most persistent household ants in Connecticut. Known for the rotten coconut smell it produces when crushed, this species forms large colony networks that invade kitchens, bathrooms, and moisture-damaged areas.

Identification:

• Size: 1/16–1/8 inch (very small)
• Color: Brown to black
• Smell: Rotten coconut when crushed
• Movement: Fast, erratic motion
• Nesting: Large multi-queen colonies

Often mistaken for pavement ants but differ by smell.

Behavior & Habitat:

They nest both indoors and outdoors, frequently in:

• Wall voids
• Behind cabinets
• Under appliances
• Beneath rocks and logs
• Moisture-damaged wood

These ants do not cause structural damage but can become a constant nuisance.

Why They Invade Connecticut Homes:

Connecticut’s humidity and older home construction create perfect conditions for odorous house ants.

They invade for:

• Moisture
• Sweets
• Food crumbs
• Grease

Most activity occurs spring through fall, especially during warm, rainy weeks.

Signs of Infestation:

• Fast-moving trails on counters
• Ants emerging from outlets
• Activity near sinks or dishwashers
• Sudden appearance after rain

Because colonies have multiple queens, infestations spread fast.

When to Call a Professional:

DIY sprays worsen the infestation by spreading colonies.
Professional baits and moisture correction offer lasting results.

Ant Control CT 

Additional Links:

• Moisture Pest Guide 
• General Pest Control