Guianan tyrannulet explained

The Guianan tyrannulet (Zimmerius acer) is a species of bird in the family Tyrannidae, the tyrant flycatchers. It is found in forests in the east Amazon Basin and northeastern Brazil. Until recently, it was considered a subspecies of the slender-footed tyrannulet.^[1]

Notes and References

1. Frank E. Rheindt . Janette A. Norman . Les Christidis . amp . 2008 . DNA evidence shows vocalizations to be better indicator of taxonomic limits than plumage patterns in Zimmerius tyrant-flycatchers . . 48 . 1 . 150–156 . 10.1016/j.ympev.2008.04.016 . 18495499.