The Bahia tyrannulet (Phylloscartes beckeri) is an Endangered species of bird in the family Tyrannidae, the tyrant flycatchers.

They assigned the specific epithet beckeri to honor the Bahian biologist Johann Becker "in recognition of his long-standing interest in several fields of natural history".

[3] The Bahia tyrannulet is the second to last of four species of genus Phylloscartes described in the late twentieth century.

Adults have a buffy stripe from the lores that becomes creamy whitish past the eye, a buffy eye-ring, and a dusky line through the eye that continues to the rear and sweeps around the dark yellowish ear coverts.

The rest of their underparts are medium yellow with faint olive markings on the sides of the breast and flanks.

It typically perches on a branch and makes short sallies to grab or hover-glean prey from leaves and twigs.

Forests within its range are severely fragmented and under continuing threat from logging and conversion to agriculture and ranching.