Schwefelbauch-Maskentyrann Tyrannopsis sulphurea

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.