White-bellied Bustard

A bright-eyed, hefty billed bird of forests and to a lesser extent scrublands. Tends to hold its tail cocked up and wings drooped, especially when feeding. Mostly gray with a blackish mask and whitish underparts. Brown Trembler is largely warm brown, lacks white underparts of Gray Trembler and has a weaker mask, if any. White-breasted Thrasher is dark brown above and largely bright white below with a dark red eye (not yellow as in Gray Trembler). Song is a slow jumble of rich whistles and high-pitched sibilant notes. Calls include scattered whistles and harsh scolding notes.

Bold patterned gnatcatcher usually found in the canopy of savanna, open woodlands, and forest edges where it may join mixed-species flocks. Largely grayish overall with a white-edged black tail. Males have a black mask while females have a small black ear patch on a generally pale face. Males of the subspecies from Northwest Brazil are whiter below and grayish in other populations.

Striking large shearwater with distinctive dark "M" pattern on upperwings. Also note crisp dark cap and clean white underwings and belly. Looks silvery-gray above when fresh, but worn birds can be more brownish. Graceful flight style. Usually easily separated from other shearwaters by wing pattern. Breeds on islands off New Zealand; ranges across the Pacific during nonbreeding season; uncommon off the west coast of the U.S. in fall. Rarely seen from land, prefers to stay offshore. Found singly or in flocks with other shearwaters.