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Yucatan Flycatcher Myiarchus yucatanensis Scientific name definitions

Leo Joseph
Version: 1.0 — Published March 4, 2020
Text last updated January 1, 2004

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Introduction

As its name suggests, this flycatcher is endemic to the Yucatán Peninsula, where it ranges as far south as northern Guatemala and northern Belize, as well as being found on Cozumel Island. Like many Myiarchus flycatchers, identification is most reliably based on voice, though visual identification is not impossible. Three subspecies are generally recognized, of which the most widespread geographically, the nominate, is strikingly rufous-crowned, making it comparatively easily identified. There is also substantial rufous in the primaries. The Yucatan Flycatcher is restricted to the lowlands, where it is found in both semi-arid and humid forests, including their edges.

Field Identification

17·5–19 cm; 19–23 g. Unusually rufescent-crowned Myiarchus (most populations) with sometimes distinct facial pattern. Nominate race has broad distinctively rufescent edges of dark brown-centred crown feathers (broadest on forecrown), creating streaked appearance; greyish lores and subocular ring; upperparts olive-green, tinged rufous on uppertail-coverts; wings brown, prominent rufous outer edges of primaries, pale greyish-white outer edges of secondaries and tertials, diffuse pale grey tips of greater and median wing-coverts (indistinct wingbars); tail brown, rufous on inner webs of rectrices (often only on innermost rectrices, often reduced or absent on outermost); throat and breast grey, abdomen and undertail-coverts yellow (not sharply demarcated from breast), tending to be washed with olive-green on upper flanks; tibial feathering olive-brown; underwing-coverts yellow; plumage colour recorded as changing rapidly after completion of prebasic moult, thus belly noticeably paler yellow (and mantle browner, tertial edges white, and dark brown of remiges and rectrices faded) in Nov than in Jan–Feb; iris, bill and legs dark, blackish. Distinguished from M. tuberculifer by greater amount of rufous in tail. Sexes similar. Juvenile presumably has rufous-tipped wing-coverts. Race lanyoni has entire upper surface darker with almost blackish cast, crown with little or no rufescent colour, abdomen paler yellow than nominate; navai is intermediate in dorsal coloration between previous and nominate, abdomen also paler yellow than nominate.

Systematics History

Editor's Note: This article requires further editing work to merge existing content into the appropriate Subspecies sections. Please bear with us while this update takes place.

See M. tyrannulus (below). Geographical variation, including populations on Cozumel I (lanyoni), seems ecophenotypic (correlated with rainfall and vegetation); nominate race and navai apparently intergrade in C Yucatán Peninsula; sampling needed to test validity of current taxonomy. Three subspecies recognized.

Subspecies


SUBSPECIES

Myiarchus yucatanensis yucatanensis Scientific name definitions

Distribution

E Mexico in extreme E Tabasco (near Balancán) and N and C Yucatán Peninsula.

SUBSPECIES

Myiarchus yucatanensis lanyoni Scientific name definitions

Distribution

Cozumel I, off NE Quintana Roo (Mexico).

SUBSPECIES

Myiarchus yucatanensis navai Scientific name definitions

Distribution

S Quintana Roo (La Vega, Chetumal) and SE Campeche (Xpujil), in Mexico, Guatemala (Tikal, in N Petén) and N Belize (perhaps including Ambergris Caye (1) ).

Distribution

Editor's Note: Additional distribution information for this taxon can be found in the 'Subspecies' article above. In the future we will develop a range-wide distribution article.

Habitat

Humid to semi-arid forest, scrubby woodland and edge; in deciduous forest found primarily in clearings or thinly wooded areas; in rainforest confined to light second growth and clearings. Sea-level to 250 m.

Movement

Presumably resident.

Diet and Foraging

Little known. Hymenopterans recorded in one stomach.

Sounds and Vocal Behavior

Dawn song a fairly loud, clear, monotonously repeated “hoor-eep” or “hoow’eep”, second part rising in frequency.

Breeding

Three males with enlarged testes in second half Mar. No other information.
Not globally threatened. Fairly common to common. Occurs in Lamanai Archaeological Reserve and Río Bravo Conservation and Management Area, in Belize, and Laguna del Tigre National Park, in Guatemala. Population on Cozumel I (race lanyoni) has proven surprisingly difficult to locate at times, and concern over its conservation status seems warranted.
Distribution of the Yucatan Flycatcher - Range Map
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Distribution of the Yucatan Flycatcher
Yucatan Flycatcher, Abundance map
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Data provided by eBird

Yucatan Flycatcher

Myiarchus yucatanensis

Abundance

Relative abundance is depicted for each season along a color gradient from a light color indicating lower relative abundance to a dark color indicating a higher relative abundance. Relative abundance is the estimated average count of individuals detected by an eBirder during a 1 hour, 1 kilometer traveling checklist at the optimal time of day for each species.   Learn more about this data

Relative abundance
Year-round
0.06
0.14
0.35

Recommended Citation

Joseph, L. (2020). Yucatan Flycatcher (Myiarchus yucatanensis), version 1.0. In Birds of the World (J. del Hoyo, A. Elliott, J. Sargatal, D. A. Christie, and E. de Juana, Editors). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bow.yucfly1.01
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