Wildlife Clinic

Species

Acadian flycatcher

Empidonax virescens

A small, greenish flycatcher of shady stream valleys, whose explosive 'peet-sa!' carries through the woods.

An Acadian flycatcher perched on a thin branch, a small olive flycatcher with a pale eye-ring, bold buff-white wing bars and a faint yellow wash below.

Photo Brandon Johnson (opens in a new tab) / iNaturalist, CC BY 4.0 (opens in a new tab)

At a glance

Size
About 13 to 15 cm long
Weight
About 11 to 14 g
Habitat
Mature, shady woods along streams and in ravines
Diet
Insects, caught in flight or picked from leaves
In Georgia
A common summer resident, April to September
Voice
A loud, sharp "peet-SA!"
Rabies vector
No

Identification

Key marks
Olive-green back; whitish throat; pale yellow wash below; eye-ring and wing bars; long wings
Told apart from
Eastern wood-pewee, which is greyer with no eye-ring
Told apart from
Least flycatcher, which is smaller and greyer
Where to look
Shady stream valleys; listen for the call

Behaviour

Acadian flycatchers catch insects in short flights from perches in the shaded understorey. They build hammock-like nests hanging from horizontal branches, often over water.

Why they matter

Acadian flycatchers need large tracts of mature forest along streams, and they are sensitive to fragmentation. Their presence shows that a stream valley still has old, shady woods.

Reproduction and lifecycle

Nest — A loose hammock of plant fibres suspended from a branch fork
Eggs — Usually two or three
Incubation — About 13 to 15 days
Chicks — Fed by both parents
Flight — At about 13 to 15 days
Lifespan — Several years

Living around people

  • Keeping forested buffers along streams protects their habitat.

Misconceptions

  • Birds of dark woods are all dull. The Acadian flycatcher's loud call is one of the most distinctive in the forest.

Related species

Seasonal activity

When this species is breeding, and when there are nests on the ground. Mowing during the shaded months is how most nests are found.

Breeding and active nests by month for this species
JanFebMarAprMayJunJulAugSepOctNovDec
BreedingJan: noFeb: noMar: noApr: noMay: noJun: noJul: noAug: noSep: noOct: noNov: noDec: no
Active nestsJan: noFeb: noMar: noApr: noMay: noJun: noJul: noAug: noSep: noOct: noNov: noDec: no
NotesIn South AmericaIn South AmericaIn South AmericaArrivingNestingNestingYoung fledgingPresentLeavingLast birdsIn South AmericaIn South America

Where it lives

Recorded in 39 states and provinces. Each one links to the other animals there, and to the rehabilitators licensed for them.

If you found one

Answer a few questions and you will get a specific answer for what you are looking at.

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