Yellow-margined Flatbill (Tolmomyias assimilis)
Illustration redrawn by AI from a real photograph

Yellow-margined Flatbill

Tolmomyias assimilis (Pelzeln, 1868)

17 gWeight

The yellow-margined flatbill or Zimmer's flatbill (Tolmomyias assimilis) is a species of bird in the tyrant flycatcher family Tyrannidae.

Busiest months: June–August and October · Most records: Peru, Brazil, Ecuador

Least Concern

Where and when it's recorded

Yellow-margined Flatbill has been recorded at 131 of the 8,171 birding hotspots we track, in 9 countries and regions.

Records by month Southern Hemisphere

Where it's recorded most

  1. Manaus – MUSA/Jardim Botânico A. DuckeBrazil174 records
  2. Los Amigos Biological StationPeru166 records
  3. Sacha LodgeEcuador163 records
More places
  1. Rio Cristalino – listas históricasBrazil146 records
  2. Reserva Natural La Isla EscondidaColombia144 records
  3. Explorer's InnPeru138 records
  4. Morro de Calzada Amazon CenterPeru99 records
  5. Estación Biológica de Cocha CashuPeru99 records
  6. Asociacion para La Conservacion de Aves y La Biodiversidad Koepcke's HermitPeru98 records
  7. Cristalino Lodge – Torre 1Brazil98 records

Countries and regions with the most records

PeruBrazilEcuadorColombiaGuyanaSurinameFrench GuianaBolivia

eBird records via GBIF up to 2024-12-31. A record means someone listed it; more records partly mean more birders, not more birds.

About

The yellow-margined flatbill or Zimmer's flatbill (Tolmomyias assimilis) is a species of bird in the tyrant flycatcher family Tyrannidae. It is found in every mainland South American country except Argentina, Chile, Paraguay, and Uruguay.

Excerpt from Wikipedia, CC BY-SA 4.0 · authors · Read more on Wikipedia

Questions

How big is the Yellow-margined Flatbill?

The Yellow-margined Flatbill weighs around 17 g.

Where does the Yellow-margined Flatbill live?

Its breeding range: South America: Amazonia. It is most often recorded in Peru, Brazil and Ecuador.

When is the best time to see the Yellow-margined Flatbill?

At the hotspots we track, it is recorded most in June, July, August and October (Southern Hemisphere).

Is the Yellow-margined Flatbill endangered?

The IUCN Red List classifies the Yellow-margined Flatbill as Least Concern.

What does the Yellow-margined Flatbill eat?

Main food: Insects & other invertebrates.

What family is the Yellow-margined Flatbill in?

It belongs to the family Tyrant Flycatchers, Calyptura (Tyrannidae), order Passerines (Passeriformes).

At a glance

Weight
17 g
Habitat
Forest
Diet
Insects & other invertebrates
Lifestyle
Perches in trees
Migration
Resident (barely migrates)
Conservation
Least Concern
More measurements
Wing
63 mm
Tail
50 mm
Bill
16 mm
Tarsus
18 mm

Averages from the AVONET dataset; length from field guides where available.

Range

South America: Amazonia

Breeding range, IOC World Bird List 15.2

Classification

Order
Passerines Passeriformes
Genus
Tolmomyias

Other birds in the genus Tolmomyias

Yellow-olive FlatbillYellow-olive FlatbillTolmomyias sulphurescensOrange-eyed FlatbillOrange-eyed FlatbillTolmomyias trayloriYellow-winged FlatbillYellow-winged FlatbillTolmomyias flavotectusGrey-crowned FlatbillGrey-crowned FlatbillTolmomyias poliocephalusOchre-lored FlatbillOchre-lored FlatbillTolmomyias flaviventrisOlive-faced FlatbillOlive-faced FlatbillTolmomyias viridicepsGrey-headed PipritesGrey-headed PipritesPiprites griseicepsWing-barred PipritesWing-barred PipritesPiprites chlorisBlack-capped PipritesBlack-capped PipritesPiprites pileataGreenish TyrannuletGreenish TyrannuletPhyllomyias virescens
Yellow-margined Flatbill

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Free to use with credit: “Illustration: Bird Album (birdalbum.com)”. Drawn by AI from a reference photo by Tomaz Nascimento de Melo. ↗

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