Phylloscopus borealis
- 16.34 × 12.53 mm
- Clutch: 5–7 eggs
Breeds in United States
White with russet spots, denser at larger end.
Sources of information
- Size
- Average of 7 eggs: Bent, Life Histories of North American Thrushes, Kinglets, and Their Allies (U.S. National Museum Bulletin 196, 1949), p. 335.
- Description
- Cornell Lab of Ornithology, All About Birds: Arctic Warbler, Life History.
- Clutch
- Cornell Lab of Ornithology, All About Birds.
- Shape
- Drawn from the length and width, with the taper estimated from the typical eggs of its group (how these eggs are drawn).
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