A fairly small owl of lowland and foothill forest and edge. Brown on the head and upperparts with a slight speckled effect, and whitish below with thick reddish-brown streaks. Note bright yellow eyes and long whiskers around the face. Similar to Chocolate Boobook, but Luzon is much smaller and lacks any white on the chest. Voice includes a single short, descending “boo!” repeated at intervals, and a short phrase “boo! wup-wup boo!”