[6] The little woodstar forages from near the ground to the forest's middle level, visiting a wide variety of flowering plants and trees.

Little is known about its foraging strategy but it is assumed to behave like its close relative the white-bellied woodstar (C. muslant).

What is thought to be the little woodstar's song is "a mixture of chips, twitters and buzzy notes, 'tsitsitsi..tzzeee-tzzeee..chichip'."

It makes "a single dry 'chip' or doubled 'chichip'" while feeding and hovering and "a squeaky 'kswee-kswee-ti-ti-ti'" while interacting with other hummingbirds.

It is threatened by continuing loss of forest habitat to logging, agriculture, settlements, and mining.