Guianan Tyrannulet
Zimmerius acer
Tiny, inconspicuous flycatcher; in addition to small size, note stubby bill, wing bars, and longish tail. Found in a variety of forest habitats including primary and secondary rainforest, low-stature forests with sandy soils, and along river edges. Often sits on leaf clusters at the ends of branches, sallying for insects; also feeds on fruit. Heard far more than seen. Most common call is a dry, two-noted hiccup that is easily overlooked; dawn song is a repeated, rising twitter.
Taxonomy
- Scientific name
- Zimmerius acer
- Authority
- (Salvin & Godman, 1883)
- Order
- Passeriformes
- Family
- Tyrannidae
- Genus
- Zimmerius
Range and habitat
- Migration
- Resident species
Conservation
- Population trend
- rising
Photos
Distribution
Bird Calls
Other Birds

Blue-crowned Lorikeet
Vini australis
A mostly green lorikeet with a relatively rounded tail and bright orange bill and feet. Bright blue crown and large red throat patch are diagnostic. Widespread through most habitats, but nomadic, often traveling between islands in search of food. Unique within its range. Vocally distinctive, with a common high-pitched “seeEEE” call. Interaction calls are more complex reels of squeaking and squealing.

Short-billed Dowitcher
Limnodromus griseus
Plump, medium-sized shorebird with very long bill. Extremely similar to Long-billed Dowitcher, and often flocks with it. Best distinguished by voice: a rapid series of notes, “tu-tu-tu”, lower-pitched and almost always in a series, unlike single piercing “keek!” of Long-billed. At all ages, look for subtle structural differences: Short-billed averages flatter-backed, slightly shorter-billed, and slightly shorter, especially noticeable when in a mixed flock. Breeding birds are intricately patterned with a variable amount of orange on the underparts. Short-billed usually has some white on the belly, and paler upperparts with bolder golden and white markings. Also look for messy and extensive spotting on sides, not sparsely barred like Long-billed Dowitcher. Nonbreeding plumage is brownish-gray overall with a paler belly; extremely similar to Long-billed but averaging slightly paler and more patterned, especially on the breast and sides. Juveniles are easiest to identify: look for bright golden markings on the tertials and scapulars. Short-billed breeds in grassy wetlands and tundra, and can be found in a variety of wetland habitats in migration and winter. A very early fall migrant, with southbound birds appearing in the U.S. by late June. Usually in flocks, feeding actively like a sewing machine. Tends to favor saltwater marshes, beaches, and mudflats. Somewhat less likely in freshwater habitats than Long-billed, but much overlap, especially the hendersoni subspecies that migrates primarily through the center of the continent.

Rio de Janeiro Antbird
Cercomacra brasiliana
Medium-sized gray antbird with a long tail. An inhabitant of the understory of dense humid forest. Males are gray with a white patch on the back that is usually concealed. Females are rufous-brown overall. Both sexes have white spots on the wing coverts and white-tipped undertail feathers.
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