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- Rhynchocyclus aequinoctialis
Identification
15 cm
- Dark olive head and upperparts
- Bright green back
- Breast area with more or less prominent grey streaks on yellowish background
- Belly and lower underparts yellowish
- Light green to yellowish-edged primaries which are fairly prominent
- Wing coverts, secondaries and tertials edged yellowish, forming two wing bars
- Large dark eye
- Whitish or grey eye-ring
Very similar to Eye-ringed Flatbill (which see). Note the wing feather edgings to distinguish the two. Maybe even more similar to Eastern Olivaceous Flatbill which is mainly separated by voice and which should not overlap in range.
Distribution
Central and South America: Northern Venezuela to Colombia and Panama, and from Colombia to Ecuador, Peru, Bolivia, and western Amazonian Brazil.
Taxonomy
Eastern Olivaceous Flatbill and Western Olivaceous Flatbill were formerly considered a single species with the name of Olivaceous Flatbill.
Subspecies
Clements recognizes these subspecies[1]:
- R. o. bardus: Eastern Panama and north-western Colombia (northern Chocó to southern Bolívar)
- R. o. mirus: North-western Colombia (lower Atrato Valley and inland from coast)
- R. o. flavus: Northern and central Colombia and northern Venezuela
- R. o. jelambianus: North-eastern Venezuela (Sucre and northern Monagas)
- R. o. tamborensis: Central Colombia (Rio Lebrija region of Santander)
- R. o. aequinoctialis: South-central and south-eastern Colombia to eastern Ecuador, eastern Peru and north-central Bolivia
- R. o. cryptus: Southwest Amazonian Brazil south of the Amazon and west of the Madeira River, west into Amazonian Peru and Bolivia
Habitat
Behaviour
Vocalisation
A series of 5-10 whistles overall increasing in pitch and becoming less buzzy. Additionally, a shorter stuttering trill is also heard and occasionally may be added at the end of the song.
References
- Clements, 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 from https://www.birds.cornell.edu/clementschecklist/download/
- Gill, F, D Donsker, and P Rasmussen (Eds). 2024. IOC World Bird List (v 14.2). Doi 10.14344/IOC.ML.14.2. http://www.worldbirdnames.org/
- Bates, J., G. M. Kirwan, and P. F. D. Boesman (2023). Western Olivaceous Flatbill (Rhynchocyclus aequinoctialis), version 1.0. In Birds of the World (B. K. Keeney, Editor). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bow.olifla2.01
Recommended Citation
- BirdForum Opus contributors. (2024) Western Olivaceous Flatbill. In: BirdForum, the forum for wild birds and birding. Retrieved 7 December 2024 from https://www.birdforum.net/opus/Western_Olivaceous_Flatbill
External Links
GSearch checked for 2020 platform.1
