Weaver ant (Oecophylla smaragdina) is an important tree canopy insect population; however, their foraging behaviour is rarely studied. A field experiment was undertaken for three consecutive days in order to evaluate the food preferences and foraging activity of weaver ants. Seven varieties of food (jaggery, sugar, sugar free, honey, dry fish, chicken intestine, biscuit) were investigated to determine the feeding preferences of the weaver ants. Chicken intestine was highly preferred by O. Smaragdina (71.23±28.43) compared to the dry fish (22.18±14.80) and sugar (8.26±7.60). At 280C temperature and 100 per cent relative humidity highest foraging activity were observed.