- 4.3–5.1 in
- 0.4–0.5 oz
- Paruline vermivore (French)
- Chipe gusanero (Spanish)
- Late in incubation the female Worm-eating Warbler sits so tight on her nest that only touching her will flush her. Her cryptic coloring makes immobility a safe strategy. If she is flushed, she will flutter across the ground with her wings and tail spread, acting helpless to lure predators away from the nest.
- Young Worm-eating Warblers typically leave their nest 8-10 days after hatching. Chicks as young as five days old have been observed leaving the nest and surviving, although they cannot fly at that age.
- Although the Worm-eating Warbler forages in the understory near the ground and nests on the ground, it does not spend much time on the forest floor. It does not forage there, and when on the ground it hops instead of walking.
- Breeds in mature deciduous or mixed deciduous-coniferous forest with patches of dense understory, usually on steep hillside.
- Winters in tropical forests.
Arthropods, spiders, slugs, and especially caterpillars.
- Clutch Size
- 3–6 eggs
- Egg Description
- White to pink, with brown speckles.
- Condition at Hatching
- Helpless and naked.
Nest a cup of skeletonized leaves lined with moss, placed on ground.
Gleans in low shrubs, but only rarely on ground. Probes into hanging dead leaf clusters and foliage.
Dependence on large forests for nesting make it vulnerable to population decreases. Populations seem stable across United States. Listed on the Audubon Watchlist
- Hanners, L. A., and S. R. Patton. 1998. Worm-eating Warbler (Helmitheros vermivorus). In The Birds of North America, No. 367 (A. Poole and F. Gill, eds.). The Birds of North America, Inc., Philadelphia, PA.