Variations in microhabitat use signify resource partitioning among Edible-nest and Glossy swift-lets at Chalis-ek with Edible-nest Swiftlets having affinity for categories, .10 m Above Forest
Canopy, .30 m Above Ground, and Above Forest Canopy, and Glossy Swiftlets for Inside Forest
Canopy and Inside Stream Bank Canopy in descending order. Variations in foraging maneuvers
indicate variations in food preferences by both species as demonstrated by gut content and
bolus analysis (Medway 1962, Harrison 1972, Hails and Amiruddin 1981, Waugh and Hails
1983, Charles 1987, Collins 2000, Laurie and Tompkins 2000). The Edible-nest Swiftlet’s affinity towards .30 m Above Ground in open land for foraging was unusual as the species has
been known to prefer forested areas. The plasticity in food selection by Edible-nest Swiftlets (Charles 1987, Laurie and Tompkins 2000) suggests two microhabitats, .10 m Above Forest Canopy and .30 m above ground, may have similar insect diversity. This demonstrates that forested habitat and microhabitats above forest canopy level are important for Edible-nest Swiftlets. Glossy Swiftlets also had affinity towards both available habitats.