Editing Comb duck (section)

{{short description|Species of bird}}
{{speciesbox
| status = LC
| status_system = IUCN3.1
| status_ref = <ref name="iucn status 19 November 2021">{{cite iucn |author=BirdLife International |date=2016 |title=''Sarkidiornis sylvicola'' |volume=2016 |page=e.T22724744A94877265 |doi=10.2305/IUCN.UK.2016-3.RLTS.T22724744A94877265.en |access-date=19 November 2021}}</ref>
| image = Amerikanische Höckerglanzgans Sarkidiornis sylvicola 05 (1).jpg
| image_caption = male
| image2 = Amerikanische Höckerglanzgans Sarkidiornis sylvicola 050807.jpg
| image2_caption =  female
| genus = Sarkidiornis
| species = sylvicola
| authority = [[Hermann von Ihering|Ihering, HFA]] & [[Rodolpho von Ihering|Ihering, R]], 1907
| synonyms = ''Sarkidiornis melanotos sylvicola''

| range_map = Sarkidiornis sylvicola map.svg

}}

The '''comb duck''' or '''American comb duck''' ('''''Sarkidiornis sylvicola'''''), is an unusual [[duck]], found in tropical wetlands in  continental [[South America]] south to the [[Paraguay River]] region in eastern [[Paraguay]], southeastern [[Brazil]] and extreme northeastern [[Argentina]],<ref name=Bencke/> and as a [[Vagrancy (biology)|vagrant]] on [[Trinidad]].

Most taxonomic authorities split this species and the [[knob-billed duck]] from each other. The comb duck is generally smaller in size when compared to the knob-billed duck, and flanks are darker (black in males, medium grey in females).
{{birdsong|url=https://xeno-canto.org/species/Sarkidiornis-sylvicola |species=Comb Duck}}