Family New World Warblers (Parulidae)

Least Concern

Connecticut Warbler (Oporornis agilis)


French: Paruline à gorge grise German: Augenring-Waldsänger Spanish: Reinita de Connecticut

Sylvia agilis

A. Wilson

, 1812,

Connecticut, USA


Reported hybrid with Geothlypis philadelphia usually considered to have been an aberrant individual of latter, although another such putative hybrid was photo-documented more recently#R. Monotypic.


Boreal zone of S Canada (from CE British Columbia E to SW Quebec) and N USA (N Minnesota E to N Michigan). Migrates to lowland South America from E Colombia and Venezuela S to N Bolivia and WC Brazil).

Descriptive notes

13·5–15 cm; 10·7–26·8 g. Distinctive, with complete pale eyering and walking gait. Male has grey hood down to upper breast, contrasting white... read more


Song loud and far-carrying, can be transcribed as “wee cher cher, wee cher cher, wee cher... read more


Breeds in bogs and on dry ridges in spruce (Picea) and tamarack (Larix laricina)... read more

Food and feeding

Feeds on small invertebrates; some fruits taken, at least in summer. Consumed large numbers of spiders (Araneae); gut content of one bird... read more


Season Jun–Jul, exceptionally to early Aug. Nest a cup of grasses and plant fibres, lined with fine grasses and hair, placed on... read more


Long-distance migrant; some evidence of non-stop transoceanic flights between SE USA and N South... read more

Status and conservation

Not globally threatened (Least Concern). Generally uncommon and local. Estimated densities on breeding grounds include 1·7–2·7 pairs/ha in closed spruce... read more

Recommended citation

Curson, J. (2019). Connecticut Warbler (Oporornis agilis). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from on 9 December 2019).