activity after fly/glide. All individual activities, except feeding attempts, had temporal variations in their proportions by month. No diurnal variation in feeding attempts and calls was
recorded. Call and follow were presumed to be mating/pairing displays as well as a response to
foraging competition. Call and follow activities by Edible-nest Swiftlets, and follow by Glossy
Swiftlets were higher during nest construction (Jan–Feb). This suggests that follow must be more
related to mating. Insect diversity was assumed to affect the occurrence of different foraging maneuvers with the presumption that different foraging maneuvers are used to prey on different type of insects. This dependence resulted in temporal (monthly and hourly) variations in the proportions of different foraging maneuvers.