Termites are eusocial insects of the order Isoptera, often called “white ants,” though they are unrelated to true ants. They are small to medium-sized, usually a few millimeters to over a centimeter long, with soft, light-colored bodies and chewing mouthparts. Most species are blind, relying on chemical and tactile signals for communication. A unique feature of termites is their reliance on gut symbionts (protozoa or bacteria) to digest cellulose, enabling them to feed on wood, grass, and other plant material. They construct elaborate nests, from underground galleries to towering mounds, which regulate temperature and humidity essential for colony survival.

Distribution: Termites thrive mainly in tropical and subtropical regions, where warmth, moisture, and abundant cellulose favor their survival. Some extend into temperate areas, but they are absent from Antarctica and extreme cold zones. Their distribution closely follows climate and food availability.

Social Organization: Termites show a well-defined caste system.

• Reproductives (Queen and King): The queen lays thousands of eggs, often becoming greatly enlarged, while the king fertilizes her and remains in the colony. Supplementary reproductives can replace them if necessary. Winged reproductives found new colonies before shedding their wings.
   
• Workers: The most numerous caste, workers are sterile, blind, and wingless. They forage, feed other castes, construct and repair nests, and care for young.
   
• Soldiers: Specialized for defense, soldiers are sterile, with enlarged mandibles or chemical-squirting nozzles to protect against predators, especially ants.

This caste-based organization ensures efficient labor division, colony protection, and ecological importance as key decomposers.