Weaver ants (Oecophylla smaragdina) build their nest by binding fresh leaves with silk from their larva. They have a shade of red colour and are known for their painful, irritating sting. They built nests when relative humidity is high, ranging from a mean daily minimum of 54% to a mean daily maximum of 94%, during monsoon , before rainy season and off- seasonal rain. This humidity range is very much applicable to Central India especially Nagpur. Recent observation has shown that ant behaviour of building nest is related to rainfall and amount of rain in monsoon of Nagpur district can be predicted based on the size, shape, numbers and position of weaver ants’ nests. This data is not valid in coastal region of India as the humidity is prevalent almost in all seasons.
