The white-fronted tyrannulet (Acrochordopus zeledoni) is a species of bird in subfamily Elaeniinae of family Tyrannidae, the tyrant flycatchers.

[2] It is found in Bolivia, Colombia, Costa Rica, Ecuador, Panama, Peru, and Venezuela.

Adults of the nominate subspecies P. z. zeledoni have a slate colored crown and nape and an olive-green back and rump.

The nominate subspecies and A. z. leucogonys have a black or fuscous maxilla and a pale pink mandible.

The subspecies are found thus:[3][10][11][12][13][14][15][16][excessive citations] The white-fronted tyrannulet primarily inhabits the canopy of humid evergreen forest in the subtropical and tropical zones.

It forages mostly in the forest's mid- and upper levels and sometimes lower, taking prey and fruits by gleaning while perched and while briefly hovering.

[10][14][15][16][excessive citations] The white-fronted tyrannulet's breeding season has not been defined but is known to include August in Panama.

One nest was a cup made of moss on a horizontal branch 12 m (40 ft) up in the canopy of a tree.