Stripe-tailed Hummingbirds sometimes pierce flowers with long corollas (Feinsinger 1977, Stiles and Skutch 1989).
When foraging or in aggressive encounters, Stripe-tailed Hummingbirds frequently utter loud buzzes and flash the tail open (Feinsinger 1977; see also Slud 1964).
This hummingbird ranges from the understory to the canopy (Howell and Webb 1995), occuring "mainly" in the canopy but "frequently descending to shrub level in gaps, along edges, or in adjacent semi-open or second growth", with only breeding females regularly occuring in the understory (Stiles and Skutch 1989; see also Slud 1964).
Little information. Male Stripe-tailed Hummingbirds are "very aggressive and often territorial in forested habitats" and Stripe-tailed Hummingbirds of either sex "invariably set up a territory .... whenever Amazilia was absent from a richer resource clump" (Feinsinger 1976).
Little information. Stripe-tailed Hummingbird presumably is polygynous, as are most if not all species of hummingbirds (Schuchmann 1999: 509).
Male Stripe-tailed Hummingbirds sing from perches at medium heights at gaps in the forest and at forest edge (Stiles and Skutch 1989).
Social and interspecific behavior
Stripe-tailed Hummingbird usually is solitary, as is typical of hummingbirds in general.
At one study site in Costa Rica, Stripe-headed Hummingbird usually is subordinate to other species of hummingbirds, especially to Steely-vented Hummingbird (Amazilia saucerrottei), but can dominate smaller species such as Canivet's Emerald (Chlorostilbon canivetii) and Magenta-throated Woodstar (Calliphlox bryantae) (Feinsinger 1976).
No reported instances of predation on Stripe-tailed Hummingbird?