Ants are most closely related to bees and wasps, which all have a narrow waist that segments their body.There are more than 12,000 species of ant, most of which are black, brown, or red in color. Ants use their keen senses to communicate with colony members. They produce chemicals called pheromones, which are sensed by other ants using their antennae. Ants are social in habit and live together in organized colonies. Ants occur worldwide but are especially common in hot climates. They range in size from about 2 to 25 mm (about 0.08 to 1 inch). Ants are one of the most common insects in India, and there are many different species of ants. Some of the most common types of ants in India include the red fire ant, the black garden ant, and the yellow crazy ant.