Photo: (c) Adrian Braidotti, some rights reserved (CC BY) / CC BY 4.0 (Wikimedia Commons)
Flat-billed Vireo
Vireo nanus
Flat-billed Vireo (Vireo nanus) — Songbirds & Perching Birds of North America.
The Flat-billed Vireo (Vireo nanus) is a member of the Vireonidae family found in North America. Adults weigh 10.5 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 Vireonidae Vireos, Greenlets, Shrike-babblers
- Genus Vireo
- Species nanus
Quick facts
- Weight
- 10.5 g
- Diet
- Invertebrate-eaters
- Family
- Vireonidae
- Order
- Passeriformes
- Habitat
- Woodland
How to identify
Similar birds
Least Concern
Least Concern
Least Concern
Vulnerable
Biology & behaviour
Diet
The Flat-billed Vireo is a invertivore — it feeds mainly on invertebrates such as insects and other small prey.
Behaviour
A bird of dense woodland, it spends much of its time perched in trees and shrubs.
Migration
The Flat-billed Vireo is largely sedentary, staying within its range year-round rather than making regular long-distance migrations.
The Flat-billed Vireo (Vireo nanus) is a member of the Vireonidae family, within the order Passeriformes. It occurs naturally across North America. Its distribution covers NA Hispaniola.
It is a very small bird. Adults weighs around 10.5 g, with a wing length of about 5.5 cm and a tail of around 5.1 cm.
The IUCN Red List currently assesses it as Least Concern. That category covers species that remain widespread and reasonably abundant in the wild.
Its mapped global range covers an estimated 13,000 km² — a relatively restricted global range.
Songs & calls
Frequently asked questions
How big is the Flat-billed Vireo?
The Flat-billed Vireo is a very small bird that weighs around 10.5 g.
Where does the Flat-billed Vireo live?
The Flat-billed Vireo is found across North America with a range covering NA Hispaniola, where it is typically found in wooded and forested habitats.
What family does the Flat-billed Vireo belong to?
The Flat-billed Vireo (Vireo nanus) belongs to the Vireonidae family, in the order Passeriformes.
What does the Flat-billed Vireo eat?
The Flat-billed Vireo is a invertivore — it feeds mainly on invertebrates such as insects and other small prey.
Does the Flat-billed Vireo migrate?
The Flat-billed Vireo is largely sedentary, staying within its range year-round rather than making regular long-distance migrations.
Is the Flat-billed Vireo 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 Flat-billed Vireo make?
1 real field recording of the Flat-billed Vireo — 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 Flat-billed Vireo's range?
The Flat-billed Vireo has a mapped global range of about 13,000 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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