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''Otus watsonii'' | ''Otus watsonii'' | ||
==Identification== | ==Identification== | ||
| − | 19-24 cm, larger in the south. In the northern part of the range described as a dark, medium sized Screech Owl; in the south occurs in slightly more rufous morph and more rarely a dark or a light grey morph but with much individual variation. | + | 19-24 cm, larger in the south. In the northern part of the range described as a dark, medium sized Screech Owl with orange to amber eyes; in the south occurs in slightly more rufous morph and more rarely a dark or a light grey morph but with much individual variation - eyes in this form warm brown to yellow. |
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==Distribution== | ==Distribution== | ||
East of the Andes in lowland [[Colombia]], [[Ecuador]], [[Peru]], and [[Bolivia]], east through Amazonian [[Brazil]], [[Venezuela]] and the [[Guianas]]. The two forms described below would separate at an east-west line approximately at the Amazon River. Reports from highland (up to 2100 m asl in the northern end of the range (Colombia and Venezuela) may refer to another (undiscribed?) species. | East of the Andes in lowland [[Colombia]], [[Ecuador]], [[Peru]], and [[Bolivia]], east through Amazonian [[Brazil]], [[Venezuela]] and the [[Guianas]]. The two forms described below would separate at an east-west line approximately at the Amazon River. Reports from highland (up to 2100 m asl in the northern end of the range (Colombia and Venezuela) may refer to another (undiscribed?) species. | ||
Revision as of 15:14, 10 September 2017
Includes: Northern, Southern Tawny-bellied Screech Owl, Austral Screech Owl
- Megascops watsonii
Otus watsonii
Identification
19-24 cm, larger in the south. In the northern part of the range described as a dark, medium sized Screech Owl with orange to amber eyes; in the south occurs in slightly more rufous morph and more rarely a dark or a light grey morph but with much individual variation - eyes in this form warm brown to yellow.
Distribution
East of the Andes in lowland Colombia, Ecuador, Peru, and Bolivia, east through Amazonian Brazil, Venezuela and the Guianas. The two forms described below would separate at an east-west line approximately at the Amazon River. Reports from highland (up to 2100 m asl in the northern end of the range (Colombia and Venezuela) may refer to another (undiscribed?) species.
Taxonomy
Tawny-bellied Screech Owl has two subspecies according to Clements checklist, M.w. watsoni and M.w. usta. These two are sometimes treated as separate species where watsoni would become Northern Tawny-bellied Screech Owl or just Tawny-bellied Screech Owl, while usta would become Southern Screech-Owl, Southern Tawny-bellied Screech-Owl, or Austral Screech Owl. According to König & Weick "Owls of the world", the two forms occur in the same forest and retain their distinct vocalizations, so the split may be warranted. Additional subspecies have been described but are not widely recognized.
This and almost all Screech Owls in the Americas have previously been considered to belong in the same genus (Otus) as the European and Asian Scops-Owls, but a reassignment to Megascops have been accepted by, among other authorities, the American Ornithologists' Union.
Habitat
Moist lowland forests and swamps, preferring low to medium strata of the forest. Generally in the interior forest, may occur close to clearings and edges.
Behaviour
Diet
Food: only described as taking invertebrates, but some vertebrate consumption seems likely.
Vocalisation
Nocturnal or crepuscular, often starting song activity relatively early. In the Southern Tawny-bellied Screech Owl range, the song is described as a very prolonged series of slow notes.
References
- Clements, J. F., T. S. Schulenberg, M. J. Iliff, B.L. Sullivan, C. L. Wood, and D. Roberson. 2012. The eBird/Clements Checklist of Birds of the World. 6th ed., with updates to October 2012. Ithaca: Cornell Univ. Press. ISBN 978-0801445019. Spreadsheet available at http://www.birds.cornell.edu/clementschecklist/downloadable-clements-checklist
- König, C. and F. Weick 2008. Owls of the World, second edition. Christopher Helm, London. ISBN 978-0-7136-6548-2
- Birdforum thread with description of the song of this species
Recommended Citation
- BirdForum Opus contributors. (2024) Tawny-bellied Screech-Owl. In: BirdForum, the forum for wild birds and birding. Retrieved 25 April 2024 from https://www.birdforum.net/opus/Tawny-bellied_Screech-Owl
