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Mistletoe Tyrannulet – Wikipedia, the free encyclopedia
The Mistletoe Tyrannulet or Paltry Tyrannulet, Zimmerius vilissimus, is a very small passerine bird in the tyrant flycatcher family. It breeds from southern Mexico to Panama. The Venezuelan Tyrannulet, Z. improbus of northern Colombia and northern Venezuela was previously considered to be a subspecies of this bird.
en.wikipedia.org/wiki/Zimmerius_vilissimus

Zimmerius – Wikipedia, the free encyclopedia
Zimmerius is a genus of Neotropical birds in the Tyrannidae family. [edit] Species. Paltry (or Mistletoe) Tyrannulet (Zimmerius vilissimus). Venezuelan Tyrannulet (Zimmerius (vilissimus) improbus). Bolivian Tyrannulet (Zimmerius bolivianus). Red-billed Tyrannulet (Zimmerius cinereicapilla). Mishana Tyrannulet (Zimmerius villarejoi). Slender-footed Tyrannulet (Zimmerius gracilipes).
en.wikipedia.org/wiki/Zimmerius

birding facts Birding Resources by the Fat Birder
Local contacts, guides, bird clubs and birding organisations in … Paltry Tyrannulet Zimmerius vilissimus Venezuelan Tyrannulet Zimmerius improbus
www.fatbirder.com/species_and_families/passerines/tyrannidae.html

Worldbirdnames.org
Paltry Tyrannulet: Zimmerius vilissimus : Venezuelan Tyrannulet: Zimmerius improbus: AS (34) Bolivian Tyrannulet: Zimmerius bolivianus : Red-billed Tyrannulet: Zimmerius cinereicapilla
worldbirdnames.org/n-flycatchers.html

A classification of the bird species of South America
A classification of the bird species of South … Zimmerius vilissimus Paltry Tyrannulet 26, 27 Zimmerius albigularis Choco Tyrannulet 26 … Phylloscartes venezuelanus Venezuelan Bristle-Tyrant 31
www.museum.lsu.edu/~Remsen/SACCBaseline08.html

Mangoverde World Bird Guide Family Page: Tyrant Flycatchers
… page of the Mangoverde World Bird … Paltry Tyrannulet : Zimmerius vilissimus : 2: 0: 0: Slender-footed Tyrannulet … Venezuelan Tyrannulet : Zimmerius improbus : 0: 0: 0
www.mangoverde.com/birdsound/fam/fam116.html

AVIFAUNA – Picchio Verde. . . l’altro web site – Birds: DNA Sibley’s …
Birds of S. Amer., 2:459). … Zimmerius vilissimus PALTRY TYRANNULET. Open woodland, forest edge. … Zimmerius improbus VENEZUELAN TYRANNULET. Open woodland, forest edge.
www.scricciolo.com/classificazione/passeriformes1.htm

Updates & Corrections — Clements Checklist
S. 1976. Handbook of North American birds. Volume 3. Yale … Zimmerius vilissimus. It retains its identity as:-Paltry Tyrannulet (Venezuelan) Zimmerius vilissimus [improbus Group
www.birds.cornell.edu/clementschecklist/corrections/Nov08updatescorr

August 2008 Taxonomic Update — eBird
Finally, we have added many bird names that eBird users … Zimmerius vilissimus [improbus Group] Paltry Tyrannulet (Venezuelan) subspecies
ebird.org/content/ebird/news/august-2008-taxonomic-update

Bird Taxonomy
Bird Taxonomy Page 6 [Home … 4083 Zimmerius vilissimus Paltry Tyrannulet 4084 Zimmerius improbus Venezuelan Tyrannulet …
www.wildlifelands.com/wxs/Taxon6.htm