Moustached Treeswift (Hemiprocne mystacea)

gorgeous bird, much larger than I'd expected, perched on a dead limb; big head and tiny nub of a bill like swifts; long, sickle-like wings crossed with even longer, very deeply forked tail; deep blue above and dark gray below; classy white eyebrow and moustache, the ends of which were free, like plumes; beautiful bird!