Family Tyrant-flycatchers (Tyrannidae)

Least Concern

Riverside Tyrant (Knipolegus orenocensis)


Taxonomy

French: Ada de l’Orénoque German: Flussufer-Dunkeltyrann Spanish: Viudita ribereña del Orinoco
Taxonomy:

Cnipolegus [sic] orenocensis

Berlepsch

, 1884,

Angostura [= Ciudad Bolívar], Río Orinoco, Venezuela

.

Hitherto treated as conspecific with K. sclateri (which see). Races geographically distant but very similar in colour and dimensions. Two subspecies recognized.

Subspecies and Distribution
  • K. o. orenocensis Berlepsch, 1884 – E Colombia (NE Meta) and C Venezuela (lower R Apure and upper R Orinoco E to Ciudad Bolívar).
  • K. o. xinguensis Berlepsch, 1912 – E Amazonian Brazil (lower R Xingu and R Araguaia).
  • Descriptive notes

    15–15·5 cm; 18.3–19.7 g (nominate), 18–21 g (race xinguensis). Male nominate race is uniform slate-grey or blackish grey, head blackest with... read more

    Voice

    Display by male in Venezuela (nominate orenocensis) comprises sheer vertical flight after... read more

    Habitat

    Semi-open scrub along rivers and near lakes; most often in early-successional growth (especially... read more

    Food and feeding

    Insects. Usually singly or in pairs, typically 0·5–4 m above ground. Sometimes perches conspicuously on bushes or low trees (... read more

    Breeding

    Almost nothing known. In breeding condition in Mar in E Colombia (NE Meta); juvenile in Apr in Venezuela; family party seen in Sept in... read more

    Movements

    Resident, but local movements will be dictated by rising and falling river levels during wet and... read more

    Status and conservation

    Not globally threatened (Least Concern). Uncommon and local, and apparently rare in E Colombia; restricted to Orinoco, Araguaia and Xingu rivers, and some of their... read more

    Recommended citation

    Farnsworth, A., Langham, G. & Kirwan, G.M. (2018). Riverside Tyrant (Knipolegus orenocensis). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from https://www.hbw.com/node/57393 on 21 November 2018).