Least Bell's Vireo
The federally- and state-listed endangered least Bell’s vireo (Vireo bellii pusillus; LBVI) is a small songbird (4 - 5 inches in size) with white eye rings, short, rounded wings, straight bills, and feathers that are dull olive-gray with paler shades of gray running to white along their bellies. LBVI are insectivorous and prey on a wide variety of insects including flies, ants, beetles, grasshoppers, moths, butterflies, and caterpillars. They forage mostly by plucking (gleaning) insects from leaves, twigs, and branches throughout the dense, lower level of the canopy, but will also feed on insects while in flight or hovering midair (hawking or flycatching).