Marsh Antwren (Formicivora acutirostris)
Illustration redrawn by AI from a real photograph

Marsh Antwren

Formicivora acutirostris (Bornschein, Reinert & Teixeira, 1995)

13–15 cmLength10 gWeight

The marsh antwren (Formicivora acutirostris) is an insectivorous bird in subfamily Thamnophilinae of family Thamnophilidae, the "typical antbirds".

Busiest months: October · Most records: Brazil

Near Threatened

Where and when it's recorded

Busiest months: October · Most records: Brazil

Marsh Antwren has been recorded at 1 of the 8,276 birding hotspots we track, in 1 country or region.

Records by month Southern Hemisphere

Where it's recorded most

  1. Salesópolis – Sítio MacuquinhoBrazil129 records

Countries and regions with the most records

Brazil

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 marsh antwren (Formicivora acutirostris) is an insectivorous bird in subfamily Thamnophilinae of family Thamnophilidae, the "typical antbirds". It is endemic to southeastern Brazil.

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

Questions

How big is the Marsh Antwren?

The Marsh Antwren is about 13–15 cm long and weighs around 10 g.

Where does the Marsh Antwren live?

Its breeding range: South America: southeastern Brazil. It is most often recorded in Brazil.

When is the best time to see the Marsh Antwren?

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

Is the Marsh Antwren endangered?

The IUCN Red List classifies the Marsh Antwren as Near Threatened.

What does the Marsh Antwren eat?

Main food: Insects & other invertebrates.

What family is the Marsh Antwren in?

It belongs to the family Antbirds (Thamnophilidae), order Passerines (Passeriformes).

At a glance

Length
13–15 cm
Weight
10 g
Habitat
Wetland
Diet
Insects & other invertebrates
Lifestyle
Perches in trees
Migration
Resident (barely migrates)
Conservation
Near Threatened
More measurements
Wing
50 mm
Tail
61 mm
Bill
15 mm
Tarsus
20 mm

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

Range

South America: southeastern Brazil

Breeding range, IOC World Bird List 15.2

Classification

Order
Passerines Passeriformes
Family
Antbirds Thamnophilidae
Genus
Formicivora

Other birds in the genus Formicivora

Narrow-billed AntwrenNarrow-billed AntwrenFormicivora iheringiBlack-hooded AntwrenBlack-hooded AntwrenFormicivora erythronotosNorthern White-fringed AntwrenNorthern White-fringed AntwrenFormicivora intermediaSouthern White-fringed AntwrenSouthern White-fringed AntwrenFormicivora griseaSerra AntwrenSerra AntwrenFormicivora serranaBlack-bellied AntwrenBlack-bellied AntwrenFormicivora melanogasterRusty-backed AntwrenRusty-backed AntwrenFormicivora rufaSincora AntwrenSincora AntwrenFormicivora grantsauiRufous-rumped AntwrenRufous-rumped AntwrenEuchrepomis callinotaChestnut-shouldered AntwrenChestnut-shouldered AntwrenEuchrepomis humeralis
Marsh Antwren

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

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