The pearly-vented tody-tyrant (Hemitriccus margaritaceiventer) is a species of bird in the family Tyrannidae, the tyrant flycatchers.

[2] It is found in every mainland South American country except Chile, Ecuador, French Guiana, and Suriname.

They have a pale iris, a reddish brown to blackish maxilla, a pinkish brown to pinkish mandible, and pink to pale grayish pink legs and feet.

The subspecies are found thus:[6] The pearly-vented tody-tyrant inhabits a variety of landscapes, many of them shrubby and dry.

[6] In Brazil it is found in arid scrub, shrubby pastures, the undergrowth of deciduous woodlands, and sometimes in gallery forest.

[10] Similarly in Colombia it is found in the undergrowth of dry woodland and in scrubby areas.

It typically forages singly, more usually in pairs, and is not known to join mixed-species feeding flocks.

It nests between January and June in Colombia and between October and December in Peru, Bolivia, and Argentina.

Though recordings of some subspecies are lacking, the pearly-vented tody-tyrant's vocalizations appear to be similar across its range.