If you have ever lived in Aruba through the rainy season, you have probably experienced the sudden appearance of small flying insects right after a shower. Locally, these insects are often called “rain flies,” although they are usually the winged stage of ants or termites. They tend to emerge in large numbers after rainfall, especially in the evening, and are drawn to lights, making them an unwelcome indoor guest.
The reason they appear so suddenly has to do with their life cycle. After a period of rain, the soil becomes soft and the humidity in the air rises. This creates the ideal conditions for winged males and females to leave their colonies, fly in swarms, and mate. Once mating is complete, they drop their wings and begin looking for a place to establish new nests. This natural event happens quickly, but it can leave you dealing with dozens of them in your living room if you are not prepared.
Rain flies are most common in Aruba between October and January, when rainfall is more frequent. During this time, there are a few practical steps that can help keep them outside where they belong.
Limit Light Attraction
Rain flies are strongly attracted to bright light at night. One of the easiest ways to avoid inviting them indoors is to keep doors and windows closed during and immediately after a rain shower. If you need lights on, consider using yellow-tinted bulbs, which are less attractive to insects, and close curtains to block the glow from escaping outside.
Seal the Openings
It only takes a small gap for rain flies to find their way indoors. Check your window screens for tears and replace or repair them if necessary. Adding weather stripping to the bottom of doors can also help reduce entry points.
Draw Them Away from the House
Some people in Aruba use an outdoor light placed at a distance from their home to lure rain flies away from entryways. Since they are naturally drawn to the brightest source, this can divert them from your windows and doors.
Clean Up Quickly
If rain flies do make their way inside, it is important to act fast. Within minutes of landing, they shed their wings and can crawl into cracks to start new colonies. Sweeping or vacuuming them right away and disposing of them well away from the house can help prevent a larger problem.
Reduce Nesting Sites Nearby
Since rain flies originate from existing ant or termite colonies, it is wise to make your property less appealing to them. Remove rotting wood or debris near the foundation, and if infestations are a recurring issue, consider treating the soil around the perimeter with an appropriate insect repellent.
Long-time residents often share a simple piece of advice: when the first big rain of the season falls, close up the house quickly. A little preparation can save you from an evening spent sweeping wings off the floor.
