- 5.5 in
- 8.3–9.1 in
- 0.4–0.5 oz
- Paruline rayée (French)
- Chipe gorra negra (Spanish)
- The song of the male Blackpoll Warbler is one of the highest-pitched of all birds.
- Part of the fall migratory route of the Blackpoll Warbler is over the Atlantic Ocean from the northeastern United States to Puerto Rico, the Lesser Antilles, or northern South America. This route averages 3,000 km (1,864 mi) over water, requiring a potentially nonstop flight of up to 88 hours. To accomplish this flight, the Blackpoll Warbler nearly doubles its body mass and takes advantage of a shift in prevailing wind direction to direct it to its destination.
Breeds in boreal coniferous forest (primarily spruce) and woodland, mixed coniferous-deciduous second growth, tall shrubs, and alder thickets; in migration and winter found in a variety of forest, woodland, scrub and brushy habitats.
Insects and spiders, fruit during migration.
- Clutch Size
- 3–5 eggs
- Egg Description
- White, buff, or pale green with brown spots all over and purplish blotches around the larger end.
- Condition at Hatching
Open cup of twigs and lichens, lined with grasses, fine plant fibers, and feathers. In small tree.
Prey usually gleaned from foliage or twigs.
In the U.S., Blackpoll Warbler populations declined by 7.3 percent per year between 1966 and 2010, resulting in a cumulative decline of 96 percent, according to the North American Breeding Bird Survey. Partners in Flight estimates a global breeding population of 60 million with 76 percent spending some part of the year in Canada, and 24 percent in the U.S. The 2014 State of the Birds Report listed the Blackpoll Warbler as a Common Bird in Steep Decline, and they rate a 9 out of 20 on the Partners in Flight Continental Concern Score.