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What are those flying bugs that come out when it rains?

Published in Insect Behavior 2 mins read

The flying bugs that commonly emerge after rain are called flying termites, also known as alates.

Flying Termites: The Alates

Flying termites are the reproductive caste within a termite colony. As social insects, their appearance after rainfall is a significant event in their life cycle. These alates, both male and female, develop wings specifically for a dispersal and mating flight.

Their emergence is a crucial strategy for the continuation and expansion of their species. They become especially active following heavy rain and can be observed flying in large numbers as they embark on this vital journey.

  • Purpose of Swarming: Flying termites primarily swarm to find mates and establish new colonies. This is their main objective during these flights.
  • Post-Rain Activity: Their activity dramatically increases after rainfall, making them a common sight during and immediately after wet weather.
  • Origin: They typically swarm up from the ground, leaving their existing nests to seek out ideal conditions for new colony formation.

The Role of Rain in Termite Swarming

Rainfall creates optimal environmental conditions that trigger and facilitate the emergence of flying termites and the establishment of new colonies. The increased moisture in the ground softens the soil, making it considerably easier for newly mated pairs to burrow down and begin constructing a new nest.

Furthermore, the high humidity often present after rain is beneficial for the alates, helping to prevent them from dehydrating during their exposed flight.

  • Softened Soil: Moist ground provides an ideal, workable medium for burrowing, which is essential for the initial stages of a new colony.
  • High Humidity: Elevated humidity levels reduce the risk of desiccation for these vulnerable insects during their dispersal flights.
  • Dispersal Conditions: Rain can often lead to less windy conditions, aiding the termites' flight and allowing them to disperse over wider areas to locate mates and suitable nesting sites.