TheMaranon tyrannulet orMarañon tyrannulet[1] (Nesotriccus maranonicus) is a species of bird in subfamily Elaeniinae of familyTyrannidae, the tyrant flycatchers.[2] It is found inEcuador andPeru.[3]
What is now the Maranon tyrannulet was previously considered a subspecies of what was then the mouse-colored tyrannulet. The unsplit species bore thebinomialPhaeomyias murina. Genetic analysis showed thatPhaeomyias was embedded withinNesotriccus and by theprinciple of priority, beginning in 2018 most taxonomists moved the species toNesotriccus.[4] However, as of late 2024BirdLife International'sHandbook of the Birds of the World (HBW) retained the species in genusPhaeomyias.[5]
Beyond the move to genusNesotriccus the Maranon tyrannulet's taxonomy is unsettled. Based on multiple lines of evidence the mouse-colored tyrannulet was split into several species, one of which is the Maranon tyrannulet.[6][7][8] TheInternational Ornithological Committee (IOC) and theClements taxonomy treat it as amonotypic species. However, HBW treats the taxon as a subspecies of theTumbesian tyrannulet (N. tumbezanus).[2][1][5]
The Maranon tyrannulet is about 12 cm (4.7 in) long. The sexes have the same plumage. Adults have a brownish gray head with an indistinct whitishsupercilium. Their upperparts and tail are brownish gray. Their wings are dusky with buff tips on thecoverts that show as twowing bars. Their throat, breast, and flanks are grayish and their belly yellowish. Both sexes have a dark brown iris, a stubby bill with whitish or pinkish at the base of themandible, and blackish legs and feet.[9][10]
As far as is known, the Maranon tyrannulet's diet and foraging behavior are the same as those of the southern mouse-colored tyrannulet, which seehere.[9]
The Maranon tyrannulet's dawn song is "a scratchy, sneezydji'dji'dji'dji DJZZEE! interspersed with a rising, buzzydzzzrrrEEE?". Its call is "a sharp DJZZEE!".[10]
TheIUCN follows HBW taxonomy and so has not separately assessed the Maranon and Tumbesian tyrannulets. The combined taxon is assessed as of Least Concern with no immediate threats identified.[11] It "may benefit from some limited degree of habitat modification, and it is unlikely to be threatened in the near future".[9]
^abcClements, J. F., P.C. Rasmussen, T. S. Schulenberg, M. J. Iliff, T. A. Fredericks, J. A. Gerbracht, D. Lepage, A. Spencer, S. M. Billerman, B. L. Sullivan, and C. L. Wood. 2023. The eBird/Clements checklist of birds of the world: v2023. Downloaded fromhttps://www.birds.cornell.edu/clementschecklist/download/ retrieved October 28, 2023
^abRemsen, J. V., Jr., J. I. Areta, E. Bonaccorso, S. Claramunt, G. Del-Rio, A. Jaramillo, D. F. Lane, M. B. Robbins, F. G. Stiles, and K. J. Zimmer. Version 28 September 2024. Species Lists of Birds for South American Countries and Territories.https://www.museum.lsu.edu/~Remsen/SACCCountryLists.htm retrieved September 29, 2024
^R. Terry Chesser, Kevin J. Burns, Carla Cicero, Jon L. Dunn, Andrew W. Kratter, Irby J. Lovette, Pamela C. Rasmussen, J. V. Remsen, Jr., Douglas F. Stotz, Benjamin M. Winger, and Kevin Winker. "Fifty-ninth supplement to the American Ornithological Society sCheck-list of North American Birds".The Auk 2018, vol. 135:798-813 retrieved December 13, 2022
^abHBW and BirdLife International (2024). Handbook of the Birds of the World and BirdLife International digital checklist of the birds of the world. Version 8.1. Available at:https://datazone.birdlife.org/species/taxonomy retrieved August 26, 2024
^Rheindt, Frank E.; Norman, Janette A.; Christidis, Les (2008). "Genetic differentiation across the Andes in two pan-Neotropical tyrant-flycatcher species".Emu.108 (3):261–268.Bibcode:2008EmuAO.108..261R.doi:10.1071/mu08020.
^Zucker, M.R., Harvey, M.G., Oswald, J.A., Cuervo, A., Derryberry, E. and Brumfield, R.T. (2016). "The Mouse-colored Tyrannulet (Phaeomyias murina) is a species complex that includes the Cocos Flycatcher (Nesotriccus ridgwayi), an island form that underwent a population bottleneck". Mol. Phylogenet. Evol. 101: 294–302.
^Harvey, M. G., G. A. Bravo, S. Claramunt, A. M. Cuervo, G. E. Derryberry, J. Battilana, G. F. Seeholzer, J. S. McKay, B. C. O'Meara, B. C. Faircloth, S. V. Edwards, J. Pérez-Emán, R. G. Moyle, F. H. Sheldon, A. Aleixo, B. T. Smith, R. T. Chesser, L. F. Silveira, J. Cracraft, R. T. Brumfield, and E. P. Derryberry (2020). "The evolution of a tropical biodiversity hotspot". Science 370:1343–1348.
^abcdefgFitzpatrick, J. W., J. del Hoyo, G. M. Kirwan, and N. Collar (2023). Marañon Tyrannulet (Nesotriccus maranonicus), version 1.1. In Birds of the World (B. K. Keeney, Editor). Cornell Lab of Ornithology, Ithaca, NY, USA.https://doi.org/10.2173/bow.moctyr4.01.1 retrieved October 17, 2024
^abcSchulenberg, T.S.; Stotz, D.F.; Lane, D.F.; O'Neill, J.P.; Parker, T.A. III (2010).Birds of Peru. Princeton Field Guides (revised and updated ed.). Princeton, NJ: Princeton University Press. p. 416.ISBN978-0691130231.
