The swarming in your home can be a nightly affair triggered by the weather. “For example, if there is a long, dry and hot spell, followed by a massive, extended downpour that significantly cools the temperature down by a few degrees, you can expect to have mass emergences of flying ants in the next few evenings,” said Dr Hwang.
But the rain may cool off their amorous pursuits. “Very generally speaking,” he continued, “insects do not fly well under rainy conditions, so you can expect less insect activity on rainy days. As such, we do expect generally less insect activity during cooler monsoonal months and heavier rains.”
Sometimes, some insects can appear in greater numbers due to their developmental cycle or food resource changes, said Dr Hwang. “A good example is the chironomid midges that mass emerge in Pandan Reservoir and Bedok Reservoir due to the food availability during different times in the reservoirs.”
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