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Publication: Traylor, Melvin A. Jr. 1979. Two sibling speices of Tyrannus (Tyrannidae). The Auk, vol. 96, no. 2. 221-233.

ITIS records citing this publication
 Kingdom Animalia
  Tyrannus couchii S. F. Baird, 1858 -- valid -- Couch's Kingbird, Tirano silbador
  Tyrannus melancholicus Vieillot, 1819 -- valid -- Tirano tropical, Tropical Kingbird
  Tyrannus melancholicus chloronotus Berlepsch, 1907 -- invalid
  Tyrannus melancholicus occidentalis Hartert & Goodson, 1917 -- invalid

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