- 5.1–5.9 in
- 8.7 in
- 0.5 oz
- Paruline à gorge grise (French)
- Reinita ojianillada (Spanish)
- The Connecticut Warbler was named after the state where the first specimen was collected. The species does not breed in Connecticut, nor is it a common migrant there.
- The oldest recorded Connecticut Warbler was at least 4 years, 3 months old when it was found in Pennsylvania in 1964. It had been banded in New Jersey in 1960.
Spruce and tamarack bogs, less frequently open poplar woodland, in migration and winter in a variety of forest, woodland, scrub and thicket habitats.
Spiders, insects, and some fruit.
- Clutch Size
- 3–5 eggs
- Egg Description
- Creamy white with dark speckles.
- Condition at Hatching
Open cup of fine, dry grasses, dry leaves, stalks of weeds, sedge stems, rootlets, or other plant fibers. Hidden on or near ground, in thick undergrowth of saplings, among thickets or at base of a shrub.
Feeds at or just above ground level.
Connecticut Warbler is uncommon, and populations declined by about 2% per year between 1966 and 2015, resulting in a cumulative decline of 62%, according to the North American Breeding Bird Survey. Partners in Flight estimates a global breeding population of 1.7 million, with 95% breeding in Canada, and 5% in the U.S. The species rates a 13 out of 20 on the Continental Concern Score. Connecticut Warbler is on the 2016 State of North America's Birds' Watch List, which includes bird species that are most at risk of extinction without significant conservation actions to reverse declines and reduce threats. Connecticut Warbler is also U.S.-Canada Stewardship species.
- Pitocchelli, J., J. Bouchie, and D. Jones. 1997. Connecticut Warbler (Oporornis agilis). In The Birds of North America, No. 320 (A. Poole and F. Gill, eds.). The Academy of Natural Sciences, Philadelphia, PA, and The American Ornithologists' Union, Washington, D.C.
- North American Bird Conservation Initiative. 2016. The State of North
America’s Birds 2016. Environment and Climate Change Canada: Ottawa, Ontario.
- Partners in Flight. 2012. Species assessment database.
- USGS Patuxent Wildlife Research Center. 2016. Longevity records of North American Birds.
- USGS Patuxent Wildlife Research Center. 2015. North American Breeding Bird Survey 1966–2015 Analysis.