The Top 3 Household Pests to Watch Out for in Oahu This Spring

Spring in Oahu brings warm weather and blooming flowers, but it also signals the return of some unwelcome visitors inside your home. As temperatures rise and humidity increases, certain pests become more active, seeking food, water, and shelter. Knowing which pests are most common this season can help you protect your home and family. Here are the top three household pests to watch out for in Oahu this spring, along with tips on how to identify and manage them.

A common house gecko resting on an plant in Oahu

1. House Geckos

House geckos are small lizards that thrive in tropical climates like Oahu’s. They are often seen on walls, ceilings, and near light sources where insects gather. While they are generally harmless and even help control insect populations, some homeowners find their droppings and occasional noise bothersome.

Identification

• Small size, usually 3 to 6 inches long

• Light brown or gray skin with a slightly translucent appearance

• Sticky toe pads that allow them to climb smooth surfaces

  
  

Why they appear in spring

Spring’s warmer nights and increased insect activity attract geckos indoors. They follow their prey and may enter homes through open doors or windows.

Managing house geckos

• Seal cracks and gaps around doors and windows

• Use screens on vents and windows

• Reduce outdoor lighting near entrances to avoid attracting insects

• Keep indoor areas clean to minimize insect food sources

  
  

While house geckos are not dangerous, their presence can be reduced by limiting the insects they feed on and blocking entry points.

2. Ants

Ants are a common nuisance in Oahu homes, especially during spring when colonies expand and workers search for food. Several species are active here, including the big-headed ant and the crazy ant, both known for invading kitchens and pantries.

Identification

• Tiny, ranging from 1/16 to 1/4 inch long

• Colors vary from black to reddish-brown

• Often seen in long trails moving toward food or water sources

  
  

Why ants invade homes in spring

Spring triggers ant colonies to grow and send out scouts to find new food supplies. Moisture from spring rains also encourages ants to seek shelter indoors.

How to prevent and control ants

• Store food in sealed containers

• Clean up crumbs and spills immediately

• Fix leaks and reduce standing water

• Use natural deterrents like vinegar or lemon juice at entry points

• Consider bait traps for persistent infestations

  
  

Ants can quickly become a problem if ignored, so early action is key to keeping them out.

3. Cockroaches

Cockroaches are among the most unwelcome pests in any home. In Oahu, the American cockroach and German cockroach are the most common species found indoors. They thrive in warm, humid environments and can spread bacteria and allergens.

Identification

• American cockroach: large, reddish-brown, about 1.5 inches long

• German cockroach: smaller, light brown with two dark stripes on the back

• Nocturnal, often hiding in dark, moist areas during the day

  
  

Why cockroaches increase in spring

The warm, humid conditions of spring create ideal breeding conditions. Cockroaches seek food and water indoors, especially in kitchens and bathrooms.

Tips to reduce cockroach problems

• Keep kitchen and bathroom areas clean and dry

• Store food properly and dispose of garbage regularly

• Seal cracks and crevices where cockroaches can hide

• Use roach baits or traps as needed

• Call a professional if infestation is severe

  
  

Cockroaches multiply quickly, so controlling them early helps protect your home’s hygiene.