Chestnut-backed Chickadee

About

The Chestnut-backed Chickadee is a small, active songbird native to the Pacific Northwest of North America. It is easily recognized by its distinctive chestnut-colored back and flanks, contrasting with a black cap and bib, and white cheeks. These birds are known for their acrobatic foraging behavior and their characteristic 'chick-a-dee' calls.

Size & lifespan

Length

11.5-13 cm (4.5-5.1 in)

Wingspan

19-21 cm (7.5-8.3 in)

Weight

8.5-12.5 g (0.3-0.44 oz)

Lifespan

Typically 2-5 years in the wild, with a maximum recorded lifespan of 9 years.

Diet

Omnivore, primarily insectivorous during breeding season, shifting to seeds, berries, and suet in winter.

Physical characteristics

Plumage

Adults have a distinctive chestnut-brown back and flanks, a black cap extending to the nape, a black bib, and clean white cheeks. The underparts are whitish, often with a buffy wash on the belly. Wings and tail are dark gray with paler edgings.

Beak shape

Small, conical, and sharply pointed; black in color.

Eye color

Dark brown.

Leg color

Dark gray to black.

Distinguishing features

The rich chestnut-brown back and flanks are the most defining features, distinguishing it from all other North American chickadees. The white cheek patch is also prominent.

Juvenile appearance

Juveniles resemble adults but may have slightly duller plumage, particularly the chestnut coloration, and a less sharply defined bib. Their overall appearance is very similar to adults shortly after fledging.

Seasonal changes

No significant seasonal plumage changes. Plumage may appear slightly worn or faded by late summer before molting.

Sexual dimorphism

Males and females are monomorphic in plumage; there are no discernible visual differences between the sexes.

How to identify

1. 1

   Back and Flank Color

   Look for the rich, reddish-brown (chestnut) coloration on the back and sides of the bird. This is the most definitive field mark.

2. 2

   Head Pattern

   Observe the black cap and bib, sharply contrasting with bright white cheek patches. The black cap extends to the nape.

3. 3

   Size and Shape

   Note its small, plump body with a relatively large head and short neck, typical of chickadees.

4. 4

   Behavior

   Watch for its active, acrobatic foraging style, often hanging upside down on branches or twigs.

5. 5

   Vocalizations

   Listen for its distinctive, buzzy 'chick-a-dee-dee-dee' call, which often sounds huskier than other chickadees, and its simple 'see-dee-dee' song.

Habitat & range

Biomes

Temperate coniferous forests, mixed forests, and deciduous woodlands.

Geographic range

Pacific coast of North America, from southeastern Alaska south through British Columbia, Washington, Oregon, and into central California. Also found in parts of Idaho.

Elevation range

Sea level up to approximately 2,000 meters (6,500 feet), primarily in lower to mid-elevations.

Preferred environments

Prefers mature and secondary coniferous forests, especially those dominated by Douglas-fir, Sitka spruce, Western hemlock, and Redwoods. Also found in mixed woodlands, riparian areas, and suburban parks and gardens with mature trees.

Behavior

Activity time

Diurnal, active from dawn to dusk.

Feeding habits

Forages actively and acrobatically among foliage, twigs, and bark, often hanging upside down. Primarily gleans insects and spiders from vegetation. Also consumes seeds, especially conifer seeds, and berries. Known to cache food items for later retrieval, particularly seeds. Readily visits bird feeders for suet and seeds.

Social behavior

Highly social, especially outside of the breeding season. Forms mixed-species foraging flocks with other small passerines like kinglets, nuthatches, and warblers. During breeding, pairs are territorial but may tolerate other chickadees nearby. Often seen in small family groups.

Flight pattern

Undulating flight pattern, typical of chickadees, with rapid wing beats interspersed with short glides.

Migration pattern

Primarily a permanent resident throughout its range. Some altitudinal migration may occur in mountainous regions, with birds moving to lower elevations during harsh winters. No significant long-distance migratory movements.

Territoriality

Pairs establish and defend breeding territories, primarily against other Chestnut-backed Chickadees. Territories are defended through vocalizations and occasional chases.

Breeding & reproduction

Breeding season

Typically April to July, with peak activity in May and June.

Nesting habits

Nests in natural cavities or old woodpecker holes in dead or decaying trees, stumps, or snags. Will also use nest boxes. The female constructs a cup-shaped nest inside the cavity, primarily using moss, lichen, bark strips, and lined with soft materials like animal hair, feathers, and plant down.

Clutch size

5-9 eggs, typically 6-8.

Egg description

Eggs are white, sometimes with fine reddish-brown spots, particularly at the larger end. They are oval-shaped.

Incubation period

11-14 days, primarily by the female.

Fledging period

18-21 days after hatching. Young are fed by both parents.

Parental care

Both parents participate in feeding the nestlings and fledglings. The female incubates, while the male brings food to her and later to the young. Fledglings remain dependent on parents for several weeks after leaving the nest.

Where to find

Field tips

1. Listen for Calls. Their distinctive 'chick-a-dee-dee-dee' call is often the first indication of their presence. Learn to distinguish it from other chickadee species.
2. Look in Mixed Flocks. During non-breeding seasons, they often join mixed-species foraging flocks. If you find one small bird species, scan for others.
3. Check Conifer Branches. Focus your search on the outer branches and needles of coniferous trees, where they actively glean insects.
4. Visit Feeders. If you have feeders in their range, offer suet or black oil sunflower seeds to attract them, especially in colder months.
5. Observe Behavior. Their constant movement and acrobatic foraging are characteristic. They rarely stay still for long.

Similar species

Quick facts

Distinguishing Feature:

Chestnut-brown back and flanks

Diet:

Insects, spiders, seeds, berries

Habitat:

Coniferous and mixed forests of Pacific Northwest

Nesting:

Cavity nester (natural or old woodpecker holes)

Sociality:

Highly social, often in mixed-species flocks

Fun facts

• Chestnut-backed Chickadees are known for their impressive food-caching abilities, hiding thousands of seeds and insects in bark crevices and under lichens for later retrieval, often remembering the locations for weeks.
• They are one of the few bird species that can digest the waxy coating of conifer needles, allowing them to extract nutrients from them, especially in winter when other food sources are scarce.
• These chickadees often roost communally in tree cavities during cold nights, huddling together to conserve body heat.
• Their 'chick-a-dee' call is thought to encode information about predator type and threat level, with more 'dee' notes indicating a higher perceived threat.

Scientific classification

Kingdom

Animalia

Phylum

Chordata

Class

Aves

Order

Passeriformes

Family

Paridae

Genus

Poecile

Species

Poecile rufescens

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