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Overview

Distribution

Geographic Range

Pheucticus melanocephalus is found throughout most of western North America, from the Pacific to the eastern foothills of the Rocky Mountains. These birds winter in Mexico and spend the remainder of the year throughout western United States and Canada, from Montana through Oregon and along the Pacific coast to Baja, California. Black-headed grosbeaks are found as far east as Kansas and Oklahoma and north throughout the provinces of Saskatchewan and British Columbia.

Biogeographic Regions: nearctic (Native ); neotropical (Native )

  • 1997. "Chipper Woods Bird Observatory" (On-line). Wild Birds Unlimited. Accessed October 15, 2005 at http://www.wbu.com/chipperwoods/photos/rbgrosbeak.htm.
  • Copyright © 2005 NatureServe, 1101 Wilson Boulevard, 15th Floor, Arlington Virginia 22209, U.S.A. All Rights Reserved. 2005. "NatureServe Explorer: An online encyclopedia of life" (On-line). NatureServe. Accessed November 21, 2005 at http://www.natureserve.org/explorer.
  • Lynes, M. 1998. "Black-headed Grosbeak (Pheucticus melanocephalus). In The Riparian Bird Conservation Plan: a strategy for reversing the decline of riparian-associated birds in California" (On-line). California Partners in Flight. Accessed October 16, 2005 at http://www.prbo.org/calpif/htmldocs/riparian_v-2.html.
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occurs (regularly, as a native taxon) in multiple nations

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National Distribution

Canada

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

Type of Residency: Breeding

United States

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

Type of Residency: Breeding

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Global Range: BREEDS: southwestern British Columbia, east to southwestern Saskatchewan, northeastern Montana, northwestern North Dakota, south along Pacific coast to northern Baja California, central and southeastern Arizona, eastern New Mexico and south into mainland of Mexico; east to central Nebraska, central Kansas, western Oklahoma, western Texas. WINTERS: in Mexico (Terres 1980).

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Physical Description

Morphology

Physical Description

Black-headed grosbeaks have the distinctive grosbeak bill, which is large, conical, thick, and straw-colored. Both genders have yellow wing linings. Females differ in color from males, featuring brown to dark grey feathers with a striped head, back, and sides, a paler bill, white wing bar, and a tan breast. Their more colorful male counterparts have white patches on the wings, a black and white tail, and black head with bright orangish-brown underparts and red legs. They are from 15 to 20 cm in length, with wingspans from 30 to 33 cm, and weighing from 38 to 54 grams.

Range mass: 38 to 54 g.

Range length: 15 to 20 cm.

Range wingspan: 30 to 33 cm.

Other Physical Features: endothermic ; homoiothermic; bilateral symmetry

Sexual Dimorphism: sexes colored or patterned differently; male more colorful

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Size

Length: 21 cm

Weight: 47 grams

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Ecology

Habitat

Habitat and Ecology

Systems
  • Terrestrial
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Black-headed grosbeaks prefer deciduous and broad-leaved evergreen woods, nesting in thickets on the edges of open woods, ponds, swamps, or streams, or in small trees.

Range elevation: 1,524 to 2,743 m.

Habitat Regions: temperate ; terrestrial

Terrestrial Biomes: forest

Wetlands: swamp

Other Habitat Features: riparian

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Comments: Deciduous forest and woodland, pine-oak association, oak scrub, pinyon-juniper woodland and deciduous thickets (Subtropical and Temperate zones) (AOU 1983). Often found on edges of ponds, streams, or forests. Usually nests in open woodlands or in trees and shrubs near streams and swamps, usually 1-8 m above ground.

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Migration

Non-Migrant: Yes. At least some populations of this species do not make significant seasonal migrations. Juvenile dispersal is not considered a migration.

Locally Migrant: Yes. At least some populations of this species make local extended movements (generally less than 200 km) at particular times of the year (e.g., to breeding or wintering grounds, to hibernation sites).

Locally Migrant: Yes. At least some populations of this species make annual migrations of over 200 km.

Breeding populations in U.S. are long-distance migrants, move south for winter. Males arrive in north in spring about a week before females arrive.

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Trophic Strategy

Food Habits

Black-headed grosbeaks prey mainly on insects and other invertebrates during the breeding season, including spiders, beetles, scale insects, flies, wasps, bees, grasshoppers, codling moth caterpillars, and cankerworms. They also eat small fruits, such as cherries, blackberries, raspberries, strawberries, elderberries, and mistletoe berries; as well as buds and seeds, which they can crack open with their large and sturdy bill. Black-headed grosbeaks forage in trees and shrubs, predominantly obtaining food from gleaning. They come readily to feeding stations and campgrounds. Their winter diet is mostly unknown.

Animal Foods: insects; terrestrial non-insect arthropods

Plant Foods: seeds, grains, and nuts; fruit

Primary Diet: omnivore

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Comments: Feeds on insects, spiders, berries, seeds, and buds. Forages in the crowns of deciduous trees; also forages in shrubs and on the ground.

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Associations

Ecosystem Roles

Black-headed grosbeak eggs provide food for a multitude of predators, including all those mentioned in predation, above. They are also predators of insects and other terrestrial invertebrates, impacting their populations, and act to disperse seeds of the fruit they eat. Brown-headed cowbirds (Molothrus ater) infrequently form a parasitic relationship with grosbeaks in Kansas, Nebraska, Colorado, Utah, and Montana. A nest parasite, cowbirds lay eggs in black-headed grosbeak nests, which are then raised by the grosbeak "parents".

Ecosystem Impact: disperses seeds

Commensal/Parasitic Species:

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Predation

Though little is known about predators of adult black-headed grosbeaks, although domestic and feral cats (Felis silvestris) have been known to eat adult birds. Eggs and nestlings are taken by a variety of predators, ranging from other birds, such as western scrub-jays (Aphelocoma californica) and magpies (Pica), to snakes, rock squirrels (Spermophilus variegatus), deer mice (Peromyscus), chipmunks, striped skunks (Mephitis mephitis), raccoons (Procyon lotor), and weasels (Mustela). This is countered by aggressive nest defense by parent birds, who attack egg predators with their sharp, large beaks.

Known Predators:

  • Ortega, C., J. Ortega. 2002. Comparison of Black-Headed Grosbeaks Nesting in Riparian and Gambel Oak Pastures in Southwestern Colorado. Southwestern Naturalist, Volume 48, Issue 3: 383--388.
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General Ecology

Both the male and female defend their nesting territory against other breeding pairs. Jays are primary nest predators in New Mexico (Hill 1988).

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Life History and Behavior

Behavior

Communication and Perception

Black-headed grosbeaks have a distinct song which resembles its close relative, rose-breasted grosbeaks (Pheucticus ludovicianus). This song is similar to that of a robin or western tanager, but richer and clearer, containing whistled notes, trills, and a back-and-forth warble. Males sing to declare territory and attract females, while females use song while foraging, to communicate or respond to other females, and to maintain contact with their offspring. Black-headed grosbeaks also use visual cues in communication, such as in assessing mates and responding to young.

Communication Channels: visual ; acoustic

Other Communication Modes: choruses

Perception Channels: polarized light

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Life Expectancy

Lifespan/Longevity

In the wild, black-headed grosbeaks have an expected lifespan between 5 and 6 years. In captivity, however, they have lived as long as 25 years.

Range lifespan

Status: captivity:
25 (high) years.

Average lifespan

Status: wild:
143 months.

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Lifespan, longevity, and ageing

Maximum longevity: 25 years (captivity) Observations: Maximum longevity from banding studies was 11.9 years (Blumstein and Moller 2008). One specimen lived 25 years in captivity (http://bna.birds.cornell.edu/).
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Reproduction

Black-headed grosbeaks are monogamous. Males arrive in the spring about six days before the females, remaining solitary until the females arrive. Males sing to establish territory and attract mates. Older males get higher quality territories, and fighting for territory can be aggressive, as black-headed grosbeaks attack swiftly during flight. Once females arrive, males will sing from perches near females, occasionally flying up into the air while singing a courtship song.

Mating System: monogamous

Black-headed grosbeak females build a nest between 4 and 25 feet above the ground over a period of 3 to 4 days, usually in deciduous trees; especially willows and coast live oaks. The nest could also be located in shrubs, bordering streams, or more rarely, gardens and parks. The nest itself is constructed thinly and loosely with twigs, rootlets, and other plant materials and placed in the dense outer foliage of a tree or shrub near an opening.

Black-headed grosbeaks produce one brood per year in the spring and early summer, from April to July. They lay 2 to 5 eggs per season. The eggs vary in color from greenish or bluish to spotted brown. Eggs hatch in 12 to 13 days with all eggs hatching within a 24 hour period. Young fledge after about 12 days, becoming independent after another 14 days. Females reach reproductive maturity around 1 year, while males mature after 3 years.

Breeding interval: Black-headed grosbeaks produce one brood every year.

Breeding season: Copulation and nesting for Pheucticus melanocephalus occurs from April through July.

Range eggs per season: 2 to 5.

Average eggs per season: 3-4.

Range time to hatching: 12 to 13 days.

Range fledging age: 11 to 15 days.

Range time to independence: 23 to 30 days.

Range age at sexual or reproductive maturity (female): 1 to 1 years.

Range age at sexual or reproductive maturity (male): 2 to 4 years.

Key Reproductive Features: seasonal breeding ; gonochoric/gonochoristic/dioecious (sexes separate)

Average eggs per season: 3.

Both sexes invest time incubating the eggs, alternating sitting periods throughout the 12 to 13 days of incubation. Occasionally, both parents will sit on the nest and sing simultaneously. In a similar fashion, both parents feed their nestlings, and females occasionally use song to communicate with their young. Males depart for breeding grounds earlier, leaving females to feed their fledged young.

Parental Investment: altricial ; pre-fertilization (Provisioning, Protecting: Female); pre-hatching/birth (Provisioning: Female, Protecting: Male, Female); pre-weaning/fledging (Provisioning: Male, Female, Protecting: Male, Female)

  • Ehrlich, P., D. Dobkin, D. Wheye. 1988. The Birders Handbook: A Field Guide to the Natural History of North American Birds. New York: Simon and Schuster Inc..
  • Kroodsma, R. 1974. Species-Recognition behavior of territorial rose-breasted and black-headed grosbeaks. The Auk, Volume 91: 54-64. Accessed November 21, 2005 at http://elibrary.unm.edu/sora/Auk/v09/n01/p0054-p0064.pdf.
  • Lynes, M. 1998. "Black-headed Grosbeak (Pheucticus melanocephalus). In The Riparian Bird Conservation Plan: a strategy for reversing the decline of riparian-associated birds in California" (On-line). California Partners in Flight. Accessed October 16, 2005 at http://www.prbo.org/calpif/htmldocs/riparian_v-2.html.
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Clutch size typically is 3-4. Incubation, by both parents, lasts 12-13 days. Altricial young are tended by both parents, leave nest in 9-12 days. See Hill (1988) for information on reproduction in New Mexico.

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Molecular Biology and Genetics

Molecular Biology

Barcode data: Pheucticus melanocephalus

The following is a representative barcode sequence, the centroid of all available sequences for this species.


There are 10 barcode sequences available from BOLD and GenBank.  Below is a sequence of the barcode region Cytochrome oxidase subunit 1 (COI or COX1) from a member of the species.  See the BOLD taxonomy browser for more complete information about this specimen and other sequences.

ACTGTACTTAATCTTCGGCGCATGAGCCGGAATAGTAGGTACTGCCCTAAGCCTCCTTATCCGAGCAGAATTAGGACAACCTGGAGCCCTTCTAGGAGACGACCAAGTTTACAACGTAGTCGTCACAGCCCATGCTTTCGTAATAATTTTCTTCATAGTTATGCCAATTATAATCGGAGGGTTTGGAAACTGATTAGTCCCTCTAATAATTGGAGCCCCAGACATAGCATTCCCACGAATAAATAACATAAGCTTTTGACTTCTACCCCCATCCTTCCTACTCCTCCTGGCATCCTCTACAGTCGAAGCAGGCGCAGGCACAGGATGAACAGTATATCCACCACTAGCTGGTAACTTAGCCCATGCCGGAGCTTCAGTTGACCTAGCAATCTTCTCCCTACATCTAGCCGGTATCTCTTCAATCCTAGGGGCCATCAACTTCATCACAACAGCAATCAACATAAAACCCCCTGCCCTTTCACAATACCAAACCCCATTATTCGTATGATCCGTACTAATCACTGCAGTACTACTTCTCCTCTCCCTTCCGGTGCTTGCCGCAGGCATCACAATGCTTCTTACAGACCGTAACCTAAACACCACATTCTTCGACCCTGCTGGAGGAGGAGACCCTGTACTATACCAACACCTTTTCTGATTCTTTGGCCATCCAGAAGTCTACATCCTAATCCTA
-- end --

Download FASTA File
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Statistics of barcoding coverage: Pheucticus melanocephalus

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 12
Specimens with Barcodes: 18
Species With Barcodes: 1
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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
LC
Least Concern

Red List Criteria

Version
3.1

Year Assessed
2012

Assessor/s
BirdLife International

Reviewer/s
Butchart, S. & Symes, A.

Contributor/s

Justification
This species has an extremely large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence <20,000 km2 combined with a declining or fluctuating range size, habitat extent/quality, or population size and a small number of locations or severe fragmentation). The population trend appears to be increasing, and hence the species does not approach the thresholds for Vulnerable under the population trend criterion (>30% decline over ten years or three generations). The population size is extremely large, and hence does not approach the thresholds for Vulnerable under the population size criterion (<10,000 mature individuals with a continuing decline estimated to be >10% in ten years or three generations, or with a specified population structure). For these reasons the species is evaluated as Least Concern.
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Black-headed grosbeaks are under no known danger and are protected under the United States Migratory Bird Treaty Act.

US Migratory Bird Act: protected

US Federal List: no special status

CITES: no special status

IUCN Red List of Threatened Species: least concern

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National NatureServe Conservation Status

Canada

Rounded National Status Rank: N5B - Secure

United States

Rounded National Status Rank: N5B - Secure

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NatureServe Conservation Status

Rounded Global Status Rank: G5 - Secure

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Population

Population Trend
Increasing
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Relevance to Humans and Ecosystems

Benefits

Economic Importance for Humans: Negative

There are no known adverse effects of Pheucticus melanocephalus on humans.

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Economic Importance for Humans: Positive

Black-headed grosbeaks tend to eat insects that we consider pests, such as caterpillars, moths, and flies. These are popular birds among birdwatching enthusiasts, especially when they build their large, cuplike nests, often adorned with flowers.

Positive Impacts: ecotourism ; controls pest population

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Wikipedia

Black-headed Grosbeak

The Black-headed Grosbeak (Pheucticus melanocephalus) is a medium-size seed-eating bird in the same family as the Northern Cardinal, the Cardinalidae. It is sometimes considered conspecific with the Rose-breasted Grosbeak, P. ludovicianus, with which it hybridises on the Great Plains.

The 19 cm long, 47 g weight Black-headed Grosbeak is a migratory bird, with nesting grounds from southwestern British Columbia, through the western half of the United States, into central Mexico. It occurs as an accidental further south in Central America.

Description[edit]

The Black-headed Grosbeak's approximate length is 18–19 cm or 6½ to 7¾ inches; it is similar in size to a Common Starling. As per its name the male has a black head. It also has black wings and tail with prominent white patches. Its breast is dark to tawny orange in color. Its belly is yellow. The female has a brown head, neck and back with sparrow-like black streaks. She also has white streaks down the middle of her head, over her eyes and on her cheeks. Her breast is white and her wings and tail are greyish-brown with two white wing bars and yellowish wing edges.

Habitat[edit]

The Black-headed Grosbeak prefers to live in deciduous and mixed wooded areas. It likes to be in areas where there are large trees as well as thick bushes, such as patches of broadleaved trees and shrubs within conifer forests, including streamside corridors, river bottoms, lakeshores, wetlands, and suburban areas. It also seems to avoid coniferous vegetation.

Nesting[edit]

Females build nests among the dense foliage on an outer branch of tall broadleaved trees or shrubs, 3–35 feet above ground. They will occasionally build in dense shrubs such as blackberry. The nest is in the shape of an open saucer, made of fine grass, rootlets twigs, bark and conifer needles. It is often lined with rootlets, hair, and fine plant material. The female lays 2–5 pale green, blue or grey eggs that are spotted with reddish and dark brown. The eggs are incubated by the male and female for 12–14 days. After the eggs have hatched the fledglings leave the nest in about 11 or 12 days, however they are unable to fly for another two weeks. The young are fed by both adults. The Black-headed Grosbeak's monogamy is under study, but pair bonds generally last for only one breeding season. They typically have one brood per season, though double broods have been documented in foothills of the Sacramento Valley in California.

Voice[edit]

Photograph of female
The female of this species looks similar to the female of the Rose-breasted Grosbeak and is best separated on geographical range.

The Grosbeak’s song is a rich warble that is similar to that of an American Robin but more fluent, faster, softer, sweeter and mellow with rising and falling passages that make the song much longer than the Robin’s. The note is a sharp ik or eek. Both the male and female sing, but have different songs.

Diet[edit]

The Black-headed Grosbeak eats pine and other seeds, berries and insects, spiders and fruit. During the summer months it mostly eats spiders, snails and insects. It is one of the few birds that can safely eat the poisonous monarch butterfly. In their wintering grounds this grosbeak consumes many monarchs and many seeds. It will come to bird feeders for sunflower and other types of seed, and fruit.

Range and migration[edit]

Black-headed Grosbeaks range from the Pacific coast to the middle of the US Great Plains and from south western Canada to the mountains of Mexico. US and Canadian are highly migratory, wintering in Mexico. In the Great Plains the range of the Black-headed Grosbeak and the Rose-breasted Grosbeaks overlap and have interbred somewhat. After the breeding season, they tend to seek out berry-rich areas. They migrate south early in the fall and return to the north late in the spring and have been known to do so in flocks.

Behavior[edit]

Black-headed Grosbeaks frequently sing from prominent perches. Both the male and female sing, but have different songs, and both are known to sing from the nest while incubating. When trying to court a female, males fly with their wings and tails spread. They forage in the foliage, on the ground or in low vegetation and are prominent berry eaters.

References[edit]

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Names and Taxonomy

Taxonomy

Comments: Where ranges overlap in Great Plains, hybridizes with P. LUDOVICIANUS (AOU 1998). Although regarded as conspecific by a few authors, they are properly regarded as constituting a superspecies (AOU 1998).

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