Slender Antbird

Cryptic night bird, more often heard than seen. Listen for namesake song, a whistled "whip-poor-WILL," repeated endlessly. Found in forests, often with a mixture of pines and deciduous trees with open areas nearby for foraging. Forages for flying insects from the ground at night. Intricately patterned with gray, brown, and black. Similar to Chuck-will's-widow but with smaller head and shorter wings and tail. Eastern and Mexican Whip-poor-wills were recently split into separate species; they differ mainly in voice and do not overlap in range.

Medium-sized flycatcher with a plumage pattern—brownish above, yellow below—that recalls Tropical Kingbird, but Sulphury Flycatcher is much darker gray on the face and head and has a contrasting white throat. Inhabits a variety of forest types but is most common in flooded and edge habitats with many palms—especially common in Moriche palm stands in savanna regions. Generally sluggish; usually in pairs, which take inconspicuous perches and sally to surrounding vegetation for insects (unlike kingbirds, which sit on exposed perches and tend to catch insects from the air). Highly vocal; distinctive, loud calls have electric quality and are usually heard before birds are seen.

Small flycatcher with a gray head, an olive-brown back, a whitish throat, and a yellow belly. Note the white eyebrow and broken eye-ring. Occurs in woodland and scrub; migrates to the northeast during the austral winter. The song is a single note followed by a trill: “twie tirrrrrrrrrrrrrrrrrr.” The similar White-crested Tyrannulet has a different song and is also slightly larger, with a white crown patch that is often concealed.