Rose-breasted Grosbeak

About

The Rose-breasted Grosbeak is a medium-sized, sexually dimorphic songbird known for the striking rose-red patch on the breast of the breeding male. It is a migratory species, breeding in eastern North America and wintering in Central and South America. They are often found in deciduous and mixed forests, particularly along edges and clearings.

Size & lifespan

Length

18-22 cm (7.1-8.7 in)

Wingspan

29-33 cm (11.4-13.0 in)

Weight

39-49 g (1.4-1.7 oz)

Lifespan

Typically 2-5 years in the wild, with records up to 12 years.

Diet

Omnivore, primarily insects and seeds, supplemented with fruits and berries.

Physical characteristics

Plumage

Adult breeding males have a distinctive black head, back, and wings, with a prominent rose-red triangular patch on the breast that extends to the underwing linings. The belly is white, and there are white patches on the wings (wing bars and primary patches) and white spots on the tail. Adult females and immatures are streaky brown and white overall, resembling large sparrows, with a prominent white supercilium (eyebrow stripe) and often a yellowish wash on the underwing linings. They lack the rose breast patch.

Beak shape

Large, conical, and stout, adapted for cracking seeds. Dark gray to black in males, paler horn-colored in females and immatures.

Eye color

Dark brown.

Leg color

Dark gray to black.

Distinguishing features

Male: Rose-red breast patch, black and white plumage. Female/Immature: Streaky brown and white, prominent white supercilium, large conical bill, often yellowish underwing linings.

Juvenile appearance

Juveniles resemble adult females but are often more heavily streaked and may have a buffier wash. Young males begin to show hints of black and rose in their first fall/winter plumage.

Seasonal changes

Males in non-breeding (winter) plumage are duller, with some brown feathering obscuring the black, and the rose patch may be less vibrant or partially obscured by white feather tips. Females and immatures show less dramatic seasonal changes, remaining streaky brown.

Sexual dimorphism

Highly sexually dimorphic. Males are strikingly black, white, and rose-red. Females are cryptically colored in streaky browns and whites.

How to identify

1. 1

   Male Plumage

   Look for the unmistakable black head and back, bright white belly, and the triangular rose-red patch on the breast. White wing bars and white patches on the primaries are also key.

2. 2

   Female/Immature Plumage

   Identify by the streaky brown and white appearance, prominent white supercilium (eyebrow), and large, pale conical bill. Often a yellowish wash on the underwing linings is visible in flight or when perched.

3. 3

   Song

   Listen for the rich, melodious, warbling song, often described as a 'sweet robin-like song' but more fluid and with a 'churry' quality. It's a key identifier, especially in dense foliage.

4. 4

   Call

   Listen for the sharp, metallic 'chink' or 'peek' call, which is distinctive and often given in flight or when foraging.

5. 5

   Bill Shape

   Note the large, stout, conical bill, characteristic of grosbeaks, which is adapted for cracking seeds. This is a good feature for distinguishing females from other streaky brown birds.

Habitat & range

Biomes

Temperate deciduous forests, mixed forests, forest edges, open woodlands, suburban gardens, parks, and orchards.

Geographic range

Breeds across eastern North America, from southern Canada south to the central and eastern United States. Winters from southern Mexico through Central America to northern South America (Colombia, Venezuela, Ecuador).

Elevation range

Typically found from sea level up to approximately 1,500 meters (5,000 feet) in breeding grounds, and similar or slightly higher elevations in wintering grounds.

Preferred environments

Prefers areas with dense understory and tall trees, often near water. Commonly found in regenerating clearcuts, forest openings, and riparian zones.

Behavior

Activity time

Diurnal.

Feeding habits

Forages in trees and shrubs, gleaning insects from foliage and bark. Also feeds on the ground for seeds. Will visit bird feeders for sunflower seeds. Diet includes beetles, caterpillars, cicadas, wild fruits (mulberries, elderberries, serviceberries), and various seeds.

Social behavior

During breeding season, typically solitary or in pairs. During migration and winter, they can be found in mixed-species flocks, sometimes in large numbers.

Flight pattern

Strong, undulating flight, often with deep wing beats. Migrates at night.

Migration pattern

Long-distance Neotropical migrant. Spring migration occurs from late April to mid-May. Fall migration from late August to early October. They migrate primarily at night.

Territoriality

Males establish and defend breeding territories through song and displays.

Breeding & reproduction

Breeding season

May to July.

Nesting habits

Nests are typically built by both sexes, often in a deciduous tree or shrub, 1-15 meters (3-50 feet) above the ground. The nest is a loosely constructed, shallow cup of twigs, rootlets, weeds, and sometimes hair, often so thin that eggs can be seen through the bottom.

Clutch size

3-5 eggs, typically 4.

Egg description

3-5 eggs, pale blue to greenish-blue, speckled with reddish-brown or purplish spots, particularly at the larger end. Approximately 24 x 18 mm.

Incubation period

11-14 days, primarily by the female, but male also assists.

Fledging period

9-12 days after hatching.

Parental care

Both parents feed the nestlings and fledglings. Males are known to be very attentive parents, often incubating eggs and brooding young during the day while the female forages.

Where to find

Field tips

1. Listen for the Song. Their distinctive song is often the first clue to their presence, especially when they are hidden in foliage. Learn to recognize it.
2. Check Forest Edges. They are often found at the interface between forest and open areas, where they can forage in both environments.
3. Look Up. They forage in the canopy and mid-story of trees, so scan the upper branches. Males are often conspicuous when singing from an exposed perch.
4. Visit Feeders. If you have a feeder with black oil sunflower seeds, especially during migration, you have a good chance of attracting them.
5. Observe Underwing Linings. For females and immatures, a flash of yellowish underwing linings in flight can be a key identification feature.

Similar species

Quick facts

Distinctive Feature (Male):

Rose-red breast patch

Distinctive Feature (Female):

Streaky brown, white supercilium, large bill

Song Quality:

Melodious, robin-like, 'churry'

Primary Diet:

Insects, seeds, fruits

Migration:

Long-distance Neotropical migrant

Fun facts

• Both male and female Rose-breasted Grosbeaks sing, which is unusual for North American songbirds. The female's song is typically softer and less complex than the male's.
• Males are known to be very dedicated parents, often taking turns incubating eggs and brooding young during the day, sometimes even more than the female.
• Rose-breasted Grosbeaks are one of the few bird species that can digest monarch butterflies, which are toxic to most birds due to the milkweed they consume as caterpillars.
• They frequently hybridize with Black-headed Grosbeaks in the narrow zone where their breeding ranges overlap in the central Great Plains.
• Their nests are often so thinly constructed that the eggs can be seen through the bottom from below.

Scientific classification

Kingdom

Animalia

Phylum

Chordata

Class

Aves

Order

Passeriformes

Family

Cardinalidae

Genus

Pheucticus

Species

Pheucticus ludovicianus

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