Bioko Speirops

Smallish chunky hawk. Identifiable by size, shape, and prominent black mask contrasting with orange cere. Generally rare. Inhabits wet forests where it hunts from the mid-level to the ground; often perches well below canopy level. Takes relatively small prey, chiefly frogs and snakes. Superficially similar to White Hawk but much smaller with orange (not blue-gray) cere; unlike White Hawk, Black-faced tends not to soar for long periods and is less frequently seen than White Hawk.

A small drab flycatcher of woodlands including, at times, mangrove swamps. This species is dull brown above and yellow-buff to orange-buff below. Adults lack wingbars and eyering, but immatures have dull buff wingbars. The tertial edges are typically quite bright, forming narrow stripes on the posterior folded wing. The Caribbean Elaenia is passingly similar but has bold wingbars and a gray eyebrow. Vocalizations include a whistled “peee-oo” followed by a low whistled trill and “pee-ooooo,” with the first syllable a clear whistle and the second a low-whistled trill. Also, commonly utters a sharp “pee.”

A large chunky vireo, widespread in tropical and subtropical wooded habitats. Forages sluggishly, mainly at mid-upper levels, sometimes joining mixed-species feeding flocks. Plumage varies across its range, but all populations have a very stout pale bill, a rusty eyebrow, and pinkish legs; underparts vary from bright yellow (as in mainland Mexico and Central America) to dingy yellow (as on Cozumel Island).