White-nest Swiftlet

Blackish ibis with white neck and underparts, beautiful iridescence on upper parts visible in good light. Adult has ‘straw-like’ plumes on neck, which are absent in juveniles. Often flies in formation at high altitudes, with flock sizes varying greatly. Typically feeds in grassland habitats, farm paddocks, and sporting fields.

Rather large headed and overall greenish flycatcher of humid tropical and subtropical forest; infrequently encountered. Inconspicuous, usually perching rather upright and quietly at mid-levels in the forest interior, rarely at edges; does not flick its wings or tail. Plumage relatively distinctive, with a contrasting, complete whitish eyering set in a pale grayish face. Lacks any distinct pale wingbars. Call is a high, shrill, insect-like note that does not draw attention.

Striking diving duck of coastal harbors, mountain lakes, and large rivers. Very similar to Common Goldeneye. Males are easiest: Barrow’s has more black on the back, a downward-pointing spur on the side, and a crescent-shaped (not circular) white patch on the face. Females can be very difficult. Barrow’s usually has a yellow bill, but Common can rarely show a dull yellowish bill. Head and bill shape are important: Barrow’s has a steeper forehead and a puffy nape, and a shorter bill with a more rounded lower edge. Fairly common in western U.S. and Canada; much less common in the northeast. Small population in Iceland. Frequently found in mixed flocks with Common Goldeneye.