Sundaschwalm Batrachostomus cornutus

Small frogmouth with piercing yellow eyes. Found in lowland and lower foothill forest, plantations, and forest edge. Both sexes are variable, but males average more strongly-patterned while females are more often rufous. White patterning on the underparts and wings varies between discrete “scales” and blotchy patches. Similar Blyth’s Frogmouth has less extensive white in its plumage, whereas Bornean and Sumatran frogmouths (both of which favor higher elevations than Sunda) are shorter-tailed; in addition, the latter has much more white on the underparts. Gives a harsh, grating caw, as well as clear whistles and a brief rolling series of harsh notes.