Male. Note: yellow crown and face, gray back, and plain white sides.
  • Male. Note: yellow crown and face, gray back, and plain white sides.
  • Female. Note: white wing bars and yellowish face with plain eye-ring.

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Hermit Warbler

Dendroica occidentalis
Passeriformes
Members of this diverse group make up more than half of the bird species worldwide. Most are small. However their brains are relatively large and their learning abilities are greater than those of most other birds. Passerine birds are divided into two suborders, the suboscines and the oscines. Oscines are capable of more complex song, and are considered the true songbirds. In Washington, the tyrant flycatchers are the only suboscines; the remaining 27 families are oscines.
Parulidae
This large group of small, brightly colored songbirds is a favorite of many birdwatchers. Wood-warblers, usually called “warblers” for short by Americans, are strictly a New World family. Most of the North American members of this group are migratory, returning in the winter to the tropics where the family originated. Warblers that nest in the understory tend to have pink legs and feet, while those that inhabit the treetops usually have black legs and feet. North American males are typically brightly colored, many with patches of yellow. Most North American warblers do not molt into a drab fall/winter plumage; the challenge posed to those trying to identify warblers in the fall results from looking at mostly juvenile birds. Their songs are generally dry, unmusical, often complex whistles (“warbles”). Warblers that live high in the treetops generally have higher-pitched songs than those that live in the understory. Warblers eat insects gleaned from foliage or captured in the air. Many supplement their insect diet with some seeds and fruit, primarily in fall and winter, and some also eat nectar. Most are monogamous. The female usually builds the nest and incubates four to five eggs for up to two weeks. Both members of the pair feed the young.
Uncommon to locally fairly common summer resident.
  • Species of Concern
  • Sound To Sage

General Description

Hermit Warblers are small, yellow-headed birds with distinctive, unstreaked flanks. They are white below and gray above, with white outer tail feathers and two white wing-bars. Males have black throats. Females' throats are grayish, with some black. In parts of Washington, Hermit Warblers hybridize with Townsend's Warblers, resulting in birds with plumage intermediate between the two species.

Habitat

Hermit Warblers are most often found in mature coniferous forests, from sea level to the mountains. During breeding season, they are most common in stands over 30 years old, and are generally absent from stands under 20 years old. They are generally found in the interior of large forests, high in the canopy.

Behavior

During migration and post-breeding, Hermit Warblers are commonly found in mixed flocks. When foraging they hop about the foliage, moving from the trunk outward to branch tips and then starting back at the trunk. They also glean items from the foliage while hovering, and will fly out to catch aerial prey. Hermit Warblers can hang upside-down to glean from the undersides of leaves and twigs. Their preference for high, dense foliage makes them difficult to spot, but they can be heard singing regularly during the breeding season.

Diet

Insects, spiders, and other invertebrates make up most of the Hermit Warbler's diet. Young birds are fed many caterpillars.

Nesting

Males arrive on the breeding grounds before females. They establish and defend territories by singing. Monogamous pairs form shortly after the females arrive. The female builds the nest, which is saddled across high limbs and concealed by overhanging branches. The nest is an open cup of weeds, needles, twigs, moss, rootlets, and spider webbing, lined with feathers, hair, and other soft material. The female incubates 4 to 5 eggs for about 12 days, and both parents feed the young. The young leave the nest 8 to 10 days after hatching, and the parents continue to feed them for at least a few days following fledging.

Migration Status

Most Hermit Warblers winter in the mountains of Mexico and Guatemala, although some winter on the California coast and north to Oregon in small numbers. In spring, they return along the coast in a fairly quick northward migration. Fall migration is generally through the mountains and is usually more drawn out than the spring movement.

Conservation Status

Hermit Warblers formerly bred as far north as British Columbia. However as Townsend's Warblers expand their range, Hermit Warblers are being supplanted, that is, they are slowly being extirpated. The northernmost edge of their current range is a zone of hybridization between Hermit and Townsend's Warblers. Hermit Warblers require specialized habitat, and that habitat (mature coniferous forest) is at risk from logging within their range. Hermit Warblers will use forests that have been lightly thinned, but will not inhabit heavily thinned or clear-cut stands. They have a relatively small range that is decreasing due to logging and the expansion of Townsend's Warblers. Although still common in many areas, Hermit Warblers are listed as a species-at-risk by Partners in Flight.

When and Where to Find in Washington

Hermit Warblers are common from mid-April to early August in the southern Cascades and southeastern Olympic Mountains. Pure Hermit Warblers are found in southern Washington, from Mount Adams and Mount Rainier west, north to the southern Olympic Peninsula. Hybrid zones are approximately 50-mile-wide bands in the southern Cascades and the Olympic Peninsula. Within the hybrid zone in the Olympic Mountains, Hermit Warblers can be found at mid-elevations between higher- and lower-elevation Townsend's Warblers.

Click here to visit this species' account and breeding-season distribution map in Sound to Sage, Seattle Audubon's on-line breeding bird atlas of Island, King, Kitsap, and Kittitas Counties.

Abundance Code DefinitionsAbundance

C=Common; F=Fairly Common; U=Uncommon; R=Rare; I=Irregular
EcoregionJanFebMarAprMayJunJulAugSepOctNovDec
Oceanic
Pacific Northwest Coast UUUU
Puget Trough UUUUR
North Cascades
West Cascades RFFFUU
East Cascades UUUU
Okanogan
Canadian Rockies
Blue Mountains
Columbia Plateau

Washington Range Map

North American Range Map

North America map legend

Federal Endangered Species ListAudubon/American Bird Conservancy Watch ListState Endangered Species ListAudubon Washington Vulnerable Birds List
Yellow ListEarly Warning

View full list of Washington State's Species of Special Concern