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Yellow-tailed Oriole Icterus mesomelas Scientific name definitions

Rosendo Fraga
Version: 1.0 — Published March 4, 2020
Text last updated January 1, 2011

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Introduction

The Yellow-tailed Oriole is a relatively long-tailed species of oriole. As is the case for most neotropical species of Icterus, the sexes are similar in appearance. The plumage is mostly golden yellow, with a black bib; the back also is black (although the rump is yellow), and the wings are black but also show a prominent yellow band on the lesser and median wing coverts. The central rectrices are black but the outer rectrices are yellow; from below the tail appears to be almost entirely yellow, although from above the tail is black with yellow margins. The Yellow-tailed Oriole does not occur in closed canopy forest, but occupies a variety of wooded habitats, often near water. The distribution extends from southeastern Mexico south to northwestern Peru. It is common throughout much of this region. In Costa Rica, however, the Yellow-tailed Oriole is highly valued for its rich, mellow song, and populations have declined as a result of pressure from the caged bird trade.

Field Identification

20·5–23·5 cm; male average 49·7 g, female average 38·5 g. Nominate race has face, throat to centre of breast, mantle and back, most of wing and central tail feathers black; remainder of head and underparts, rump, uppertail-coverts and outer tail feathers bright yellow, more golden on head; lesser, median and most of inner greater upperwing-coverts bright yellow (striking epaulet), inner secondaries and tertials edged yellowish, primaries edged white distally; iris dark brown; bill black, base of lower mandible grey; legs ­bluish-grey. Sexes similar. Juvenile is greenish-yellow above and drab yellow bellow; imma­ture has black face and throat like adult, but dusky olivaceous upperparts, wing and tail. Races differ mainly in plumage coloration, bill shape and size: salvinii lacks yellowish edgings on secondaries, is more orange-tinged on head; carrikeri resembles previous, but on average paler orange, and has smaller bill; taczanowskii is smaller in size, and has tertial edges white, more extensive yellow in tail.

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.

Hybridizes rarely with I. chrysater. Form I. xantholemus, known only from type specimen supposedly taken in Ecuador and previously thought to be immature of present species or perhaps a hybrid of unknown parentage, now shown to be a synonym of Xanthopsar flavus. Four subspecies recognized.

Subspecies


SUBSPECIES

Icterus mesomelas mesomelas Scientific name definitions

Distribution

S Mexico (from Veracruz) S to Honduras.

SUBSPECIES

Icterus mesomelas salvinii Scientific name definitions

Distribution

Caribbean lowlands from Nicaragua S to W Panama (Bocas del Toro).

SUBSPECIES

Icterus mesomelas carrikeri Scientific name definitions

Distribution

Panama (from E of Canal) S on both coasts to W and C Colombia and NW Venezuela (Zulia, Táchira and Mérida).

SUBSPECIES

Icterus mesomelas taczanowskii Scientific name definitions

Distribution

Pacific coast of Ecuador and NW Peru (Tumbes, also upper Marañón Valley).

SUBSPECIES

Icterus mesomelas xantholemus Scientific name definitions

Distribution

Ecuador (probable immature taczanowskii or unknown hybrid)

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

Inhabits humid places, including thick low shrubbery and bamboo, second-growth forest, swamp-forest, also banana plantations; commonly near water. Lowlands to c. 500 m; locally to 1000 m (salvinii), and up to 1750 m (taczanowskii).

Movement

Appears resident.

Diet and Foraging

Insects and other arthropods, e.g. centipedes (Chilopoda); also some fruit and nectar (including Erythrina). Stomach contents included ants (Formicidae), cockroaches (Blattodea), crickets (Orthoptera), several families of beetles (Coleoptera), and caterpillars. Feeds on fruits on the native trees Ehretia tinifolia (Boraginaceae) and Talisia olivaeformis (Sapindaceae). Unlike congeners, tends to keep low down in dense vegetation. Arthropods usually gleaned from foliage. Forages in pairs and in family groups; sometimes with other orioles.

Sounds and Vocal Behavior

Rich mellow song, by both sexes, consists of repeated phrases in which warbles mixed with trills; songs in Ecuador harsher in tone. Call a nasal “chew”, also harder “chuk” or “chik”.

Breeding

Season Apr–Jun in Costa Rica and Panama, and Sept–Nov in N Colombia. Probably monogamous. Solitary breeder. Nest a pendent shallow basket woven from slender plant fibres, with strong but open fabric, external diameter 11–12 cm, external depth 9 cm, attached to parallel twigs or branch fork 2–4 m up in tree; one nest in Colombia was attached to underside of leaf of an ornamental palm species growing in garden. Clutch 3 eggs, light blue with spots of brown and black, mean dimensions 23·9 × 17·8 mm; incubation by female, period 14 days; chicks fed by both parents, nestling period 12–13 days.
Not globally threatened. Fairly common to common in much of range; uncommon in Peru. Widely captured as a cagebird, and for that reason locally scarce in Costa Rica. Found in many protected areas, such as Barro Colorado Nature Monument and Soberanía National Park (Panama).
Distribution of the Yellow-tailed Oriole - Range Map
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  • Migration
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Distribution of the Yellow-tailed Oriole

Recommended Citation

Fraga, R. (2020). Yellow-tailed Oriole (Icterus mesomelas), 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.yetori1.01
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