tree swift: birds of southeast Asia and East Indies differing from true swifts in having upright crests and nesting in trees
apodiform bird: nonpasserine bird having long wings and weak feet; spends much of its time in flight
hydrogen peroxide: a viscous liquid with strong oxidizing properties; a powerful bleaching agent; also used (in aqueous solutions) as a mild disinfectant and (in strong concentrations) as an oxidant in rocket fuels