Photo: Dario Sanches from São Paulo, Brazil / CC BY-SA 2.0 (Wikimedia Commons)
Unicolored Antwren
Myrmotherula unicolor
Unicolored Antwren (Myrmotherula unicolor) — Songbirds & Perching Birds of South America.
Found across 2 guides in our atlas — open any for the full checklist, photos and what's around right now.
The Unicolored Antwren (Myrmotherula unicolor) is a member of the Thamnophilidae family found in South America. Adults weigh 11.5 g. The IUCN Red List lists it as Least Concern.
Conservation status
IUCN Red List (opens in a new tab)Widespread and abundant — not currently at risk.
Where it fits
- Class Aves
- Order Passeriformes
- Family Thamnophilidae Antbirds
- Genus Myrmotherula
- Species unicolor
Quick facts
- Weight
- 11.5 g
- Diet
- Invertebrate-eaters
- Family
- Thamnophilidae
- Order
- Passeriformes
- Habitat
- Woodland
How to identify
Similar birds
Least Concern
Critically Endangered
Least Concern
Least Concern
Biology & behaviour
Diet
The Unicolored Antwren is a invertivore — it feeds mainly on invertebrates such as insects and other small prey.
Behaviour
A bird of dense forest, it spends much of its time perched in trees and shrubs.
Migration
The Unicolored Antwren is largely sedentary, staying within its range year-round rather than making regular long-distance migrations.
The Unicolored Antwren (Myrmotherula unicolor) is a member of the Thamnophilidae family, within the order Passeriformes. It occurs naturally across South America. Its distribution covers SA se Brazil.
It is a very small bird. Adults weighs around 11.5 g, with a wing length of about 4.8 cm and a tail of around 3.6 cm.
The IUCN Red List currently assesses it as Least Concern. That category covers species that remain widespread and reasonably abundant in the wild.
The species has a mapped global range of roughly 69,000 km².
Songs & calls
Frequently asked questions
How big is the Unicolored Antwren?
The Unicolored Antwren is a very small bird that weighs around 11.5 g.
Where does the Unicolored Antwren live?
The Unicolored Antwren is found across South America with a range covering SA se Brazil, where it favours woodland, forest and well-treed country.
What family does the Unicolored Antwren belong to?
The Unicolored Antwren (Myrmotherula unicolor) belongs to the Thamnophilidae family, in the order Passeriformes.
What does the Unicolored Antwren eat?
The Unicolored Antwren is a invertivore — it feeds mainly on invertebrates such as insects and other small prey.
Does the Unicolored Antwren migrate?
The Unicolored Antwren is largely sedentary, staying within its range year-round rather than making regular long-distance migrations.
Is the Unicolored Antwren endangered?
The IUCN Red List currently assesses it as Least Concern That category covers species that remain widespread and reasonably abundant in the wild.
What sound does the Unicolored Antwren make?
1 real field recording of the Unicolored Antwren — including its song — can be played in the Songs & calls section on this page, credited to the recordist who captured it.
How large is the Unicolored Antwren's range?
The Unicolored Antwren has a mapped global range of about 69,000 km².
Conservation
Every bird benefits from bird-safe windows, native plants, and keeping cats indoors. Small changes at home add up to real protection.
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Guides for this bird
Best Bird Feeders for Garden Songbirds
How to choose a bird feeder for garden songbirds — the feeder styles compared, the seed they prefer, where to hang it, and how to keep birds safe. A decision framework grounded in real data, with no mystery picks.
Meet the Thamnophilidae
A field guide to the Thamnophilidae family — 240 species in the Birbs encyclopedia, with the best-known members to start with.