Unicolored Thrush

Extremely similar to widespread Rufous Hummingbird; identical in plumage except for males' solid green back (which can be shown by Rufous too). Breeds only along a narrow strip of coastal California and southern Oregon. On females and immature males, the only way to separate them from Rufous is by the shape of the tail feathers, which is extremely difficult to determine without good photographs.

Medium-sized songbird of woodlands, neighborhoods, and parks. Male grayish brown with black head and wings, faintly orange flanks, and a dark-tipped yellow bill. Female similar but lacks the black head, has much paler orange on the flanks, and is an overall brownish tone. Male similar to Japanese Grosbeak, which has less black on the head, no orange on the flanks, and lacks the dark tip to the bill of most adult male Yellow-billed Grosbeaks. Often detected as it gives a hard "jik!" while flying overhead.

Large, stout wren-babbler. Highly dependent on pristine lowland forests; populations now declining and increasingly fragmented across Borneo as that habitat is rapidly deforested. Shy, foraging quietly under dense cover and amongst fallen trunks, usually in pairs or small groups. Best detected by song, a simple but beautiful two-note series of mournful, clear whistles: “doooo-deeee.” If seen well, note whitish face, white-and-black-streaked underparts, brown back, and pot-bellied appearance.