- Band-tailed Cacique
 - Band-tailed Cacique
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Band-tailed Cacique Cacicus latirostris Scientific name definitions

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

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Introduction

The sole representative of the genus Ocyalus, this small black and generally rare oropendola is a distinctive and unusual species. The nape is dark chestnut, with blue eyes, and a very distinctive tail pattern, appearing largely yellow with a broad black tip and narrow black edges, which is perhaps best appreciated when seen below, although if the tail is held tightly closed then it can appear virtually all black. The pale bill is rather broad with an obviously enlarged frontal shield. The Band-tailed Cacique inhabits the upper stories of seasonally flooded and swamp forests, including on river islands, and is almost endemic to eastern Peru, although it ranges north to southernmost Colombia and further east into western Amazonian Brazil. Although the species has occasionally been found nesting in colonies of its own kind, the Band-tailed Cacique appears to usually nest alone, albeit within colonies of oropendolas, perhaps especially Casqued Oropendolas (Psarocolius oseryi).

Field Identification

Male average 33·2 cm, 117·5 g; female average 24·5 cm, 74·8 g. Comparatively small oropendola looking all black at a distance, except for distinctive tail pattern in flight. Male has crown, nape and upper back dark chestnut; rest of plumage mostly velvety black, wing with bluish gloss; tail yellow with glossy black centre and tip, forming inverted T-pattern (usually concealed when bird perched); iris pale blue, rarely brown (possibly juvenile); bill variable, ivory-coloured with diffuse dusky wash around tip, or mostly dusky grey above, ivory-coloured below; legs black. Female is like male, but somewhat smaller and duller. Juvenile undescribed.

Systematics History

Previously placed in genus Ocyalus but multiple genetic data indicate that this species must be subsumed into Cacicus to prevent latter from becoming paraphyletic (1, 2). General morphology, size and behaviour are supportive of this treatment. Monotypic.

Subspecies

Monotypic.

Distribution

W Amazonian lowlands in extreme S Colombia (around Leticia, in Amazonas), NE Ecuador, NE Peru (Loreto, Ucayali) and W Brazil (SW Amazonas and W Acre).

Habitat

Amazonian floodplain-forest (várzea) along rivers, even on older islands; reported also in upland (terra firme) forest, but near rivers. Up to 300 m.

Movement

Apparently sedentary.

Diet and Foraging

Stomach contents include unidentified fruits and caterpillars (Lepidoptera), but diet probably includes other arthropods, small vertebrates and nectar. Forages mostly below canopy. Often reported in mixed-species foraging flocks with Psarocolius angustifrons and C. cela, and up to 50 individuals of present species reported in one such mixed flock in Brazil; rarely, in monospecific groups of 3–8 individuals.

Sounds and Vocal Behavior

Foraging calls described as liquid “chewop”, “ke-cho” and “skeedelp-chop”; also a sharp “chiek”. A more complex, two-part vocalization, “cho we-cho wo”, with pleasant liquid tone, is probably the song. Repertoire and vocal timbre reminiscent of those of C. solitarius.

Breeding

Season Aug–Sept in Peru and Brazil. Mating system seems monogamous to polygynous, but information on breeding minimal. Breeds solitarily or in colonies of up to 15–20 nests. One solitary nest in Brazil was a purse, open at top, similar in shape to that of C. haemorrhous, woven from diverse plant fibres, built 17 m up and above a colony of C. oseryi in isolated Cecropia tree near small river; this nest contained chicks, fed by only one adult. No other information.
Not globally threatened. Very rare in Ecuador, where known from one old specimen and a few sight records; more abundant in Peru and Brazil; uncommon in Colombia. Occurs in some protected areas in Peru, e.g. Pacaya-Samiria National Reserve, and Brazil, e.g. Serra do Divisor National Park. May merit protected status in Ecuador.
Distribution of the Band-tailed Cacique - Range Map
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  • Migration
  • Breeding
  • Non-Breeding
Distribution of the Band-tailed Cacique

Recommended Citation

Fraga, R. (2020). Band-tailed Cacique (Cacicus latirostris), 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.batoro1.01
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