The Guianan Tyrannulet (Zimmerius acer) is a species of bird (Aves) in the family Tyrannidae (Tyrant Flycatchers) and order Passeriformes (Perching Birds).
Zimmerius bolivianus
Zimmerius chicomendesi
Zimmerius albigularis
Zimmerius chrysops
Zimmerius vilissimus
Zimmerius acer
Zimmerius villarejoi
Zimmerius parvus
Zimmerius viridiflavus
Zimmerius cinereicapilla
Zimmerius gracilipes
Zimmerius improbus
Zimmerius petersi