The Yungas Tyrannulet (Phyllomyias weedeni) is a species of bird in the Tyrannidae family. It is, as suggested by its common name, restricted to humid and semi-humid forest in the Yungas of north-western Bolivia and far south-eastern Peru. Although discovered in the early 1990s, it was only formally described in 2008. It resembles the Planalto Tyrannulet, but has a different voice. Being recently described, it has not yet been rated by BirdLife International, but as it occurs in low densities within a small range that is subjected to extensive habitat destruction, it has been recommended treating it as vulnerable.