Abstract: Kanyakumari, the southernmost district of India, lies between 8°5'-8°30' N lat.and between 77°10'-77°36' E longitude, covering an area of 1,684 sq.km. Of this, 446 sq.km are forests. All areas except forests, were surveyed during this study. Red weaver ants are found from India to Queens land, Australia and Solomon Islands (Lokkers,1986). It is generally believed that the Asian red weaver ants live broad-leaved evergreen trees. The present study reveals that they also live on deciduous trees, small leaved trees and some climbers. Oecophylla smaragdina is a major pest of some fruit trees and minor pest of some other trees. It reduces the yield of causes difficulties during harvesting and management farms. Even though it does not cause much direct damage to the crops, some of its associates are harmful. However, O. smaragdina has been known to protect some plants from harmful insects (J.D.Tothill et al. 1930). The present investigation illustrates the frequency of nesting of arboreal red weaver ants in various species of flowering plants in the study area. In Kanyakumari dist.68 species of flowering plants harbor Asian red weaver ants (Oecophylla smaragdina Fb.).