Home, near and far.
This species is found across most of North America east of the Rocky Mountains, extending into Canada during the breeding season. They are adaptable and have expanded their range with human alteration of landscapes.
Birds Heard
FIELD GUIDE
FIELD GUIDE
New World Blackbirds, Troupials, and Allies
Common Grackle
Quiscalus quiscula
The Common Grackle is a familiar and widespread blackbird across much of North America, recognized by its lanky build and iridescent plumage. These adaptable birds are often seen walking with deliberate steps in open areas or gathering in noisy flocks. Their glossy feathers shimmer with various hues depending on the light and geographic location.
Resident/MigratoryMedium-large sizeHarsh callsOmnivorous diet
- Length
- 28-34 cm
- Wingspan
- 36-46 cm
- Weight
- 74-142 g
Typical adult measurements.
Individuals and populations vary.
01 / The telltale details
You’ll know it
when you see it.
Start with shape and behavior. Then look for the smaller details.
- 01
Adult Male
Glossy black overall with iridescent purplish-blue or bluish-green on the head, neck, and breast, contrasting with a bronzy body in some regions. Features a long, tapered bill and pale yellow eyes.
- 02
Adult Female
Similar to the male but generally smaller and less glossy, with a shorter tail that does not typically keel in flight.
- 03
Juvenile
Primarily brown plumage with dark brown eyes, lacking the iridescence of adults.
- 04
Tail Shape
Long, graduated tail that often appears keeled (folded down the middle into a shallow V shape) in flight, particularly in males.
02 / A place in the world
Where life
takes it.
Common Grackles inhabit a variety of open and semi-open environments, including agricultural fields, suburban lawns, parks, and wetlands. They are frequently found near human habitation and areas with scattered trees, especially conifers, which they use for nesting and roosting.
Stay a while. Or follow the season.
Northern populations are migratory, moving south to the southeastern United States for winter, while southern populations may be year-round residents. They often form large, mixed-species flocks during migration and in winter.
03 / Listen a little closer
A voice
of its own.
Their vocalizations include harsh, metallic, squeaky sounds, often likened to a rusty gate. The song is a mix of grating whistles, squeals, clicks, and rattles.
04 / The life behind the feathers
A day in its world.
On the menu.
Common Grackles are omnivorous and opportunistic foragers. Their diet includes a wide range of items such as insects, seeds (especially corn and acorns), berries, small fish, frogs, and even eggs and small birds.
They primarily forage on the ground, using their bills to uncover food. They may also wade into shallow water, follow plows to catch invertebrates, or even steal food from other birds.
A place to begin.
Females construct bulky, cup-shaped nests typically in dense trees or shrubs, often conifers, though unusual sites like tree cavities or human structures are also used. They often nest in colonies.
The little routines.
Highly gregarious, Common Grackles often gather in large, noisy flocks, especially outside the breeding season, sometimes forming communal roosts with thousands of individuals, including other blackbird species. They engage in a behavior called 'anting.'
One more reason to pay attention
A familiar face.
A few surprises.
Common Grackles sometimes engage in 'anting,' where they allow ants to crawl on their feathers, possibly to rid themselves of parasites.
They possess a hard keel on the inside of their upper mandible, which they use to saw open acorns.
Historically, Common Grackles were sometimes referred to as 'Crow Blackbirds' or 'Purple Grackles.'
05 / An eye for the difference
Could it be
someone else?
Rusty Blackbird
Euphagus carolinusRusty Blackbirds lack the Common Grackle's long, graduated tail and do not hold it in a keeled shape.
Brewer's Blackbird
Euphagus cyanocephalusBrewer's Blackbirds are smaller and lack the Common Grackle's long, keeled tail and distinct iridescent head-body contrast.
Great-tailed Grackle
Quiscalus mexicanusGreat-tailed Grackles are significantly larger with an even more pronounced, striking tail.
Behind these field notesResearch & references · 11 sources
AI-assisted species research. Prepared September 2026. Details can vary across regions and populations.