Gray-bellied Comet

A tiny antwren with a very short tail. Looks like a ping-pong ball bouncing around the middle levels and canopy in lowland forest and edge. Occurs from Panama to Peru and Brazil. Male has a pale yellowish belly, bold black-and-white striping on the head and back, and thick white wingbars. Female is similar, but has a buffier head and upper breast. Best distinguished from Pygmy Antwren by voice. Listen for the long series of piping whistles that accelerates slightly at the end. The series is longer and doesn’t accelerate as rapidly as Pygmy. Also note thicker black mustache stripe and eyeline on Moustached Antwren.

Large tern, found strictly in coastal areas. Feeds in open ocean and saltwater bays, where it flies high above the water looking for small fish. Rests on beaches, often in groups with other species. Separated from many terns by large size; only slightly smaller than Caspian. Look for the thinner orange bill (usually not deep red) and shaggier crest compared with Caspian. Also, forehead whiter than Caspian Tern in the nonbreeding season; this can show as early as midsummer.

Small, mostly brown flycatcher that inhabits lightly wooded areas and forest edge. Good field marks include its streaky breast, tan wingbars, and lack of strong facial markings. Typically seen alone or in pairs, often sitting quietly on a low perch. Vocalizations include a rising trill and a clear whistle. Note that birds found west of the Andes from southern Colombia to northern Chile are now considered to be different species.