Measurements
Both Sexes
- Length
- 4.3–5.1 in
11–13 cm - Weight
- 0.4 oz
10 g
Other Names
- Pouillot boreal (French)
- Mosquitero boreal (Spanish)
Cool Facts
- The Arctic Warbler is one of the few species that breeds in North America and winters in Asia.
- An Arctic Warbler was observed to evade a falcon by landing near people.
Habitat
Forest
Breeds in taiga, mainly in stands of dwarf willow, often along streams. Also in spruce woods in central Alaska.
Food
Insects
Insects.
Nesting
Nesting Facts
- Clutch Size
- 5–7 eggs
- Egg Description
- White with russet spots, denser at larger end.
- Condition at Hatching
- Naked and helpless.
Nest Description
Domed nest of grasses, mosses and leaves, with lining of fine grass and hair. Entrance hole on side. Placed in vegetation on ground.
Nest Placement
Ground
Behavior
Foliage Gleaner
Constant wing flicking while foraging may flush prey. Picks insects off vegetation.
Conservation
Least Concern
Breeding areas in North America are remote and largely unaltered by humans.
Credits
- Lowther, P. 2001. Arctic Warbler (Phylloscopus borealis). In The Birds of North America, No. 590 (A. Poole and F. Gill, eds.). The Birds of North America, Inc., Philadelphia, PA.