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Molothrus ater
The Brown-headed Cowbird is a small bird with a brown head and a shiny black body. They are known for laying their eggs in other birds' nests, which is a unique way of raising their young!
Habitat: Grasslands
The Brown-headed Cowbird male is glossy black with a distinct brown head. Females are plain grayish-brown. Both have a short, conical beak adapted for seed-eating, and are smaller than a robin.
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Category
BirdsRarity
Common
Danger
1/5 · Very low
Snaps
Be the first to snap!
A single female cowbird can lay over 30 eggs in one breeding season!
Baby cowbirds often hatch earlier than host chicks, giving them a head start!
They often follow large animals, like cows, to catch insects stirred up by hooves!
They've been recorded laying eggs in over 220 different bird species' nests!
Brown-headed Cowbird can quickly locate other bird's nests because they are excellent observers, helping them lay eggs stealthily.
Brown-headed Cowbird has eggs that often blend in with host eggs, helping them trick parents into incubating their young.
Brown-headed Cowbird chicks can grow faster than host chicks, helping them outcompete for food and attention.
These adaptable birds eat lots of seeds and juicy insects, finding food wherever they can!
Age differences: Young chicks are fed by host parents, primarily insects. Adults forage for a mixed diet.
Passerella iliaca
Lays eggs in their nest

Vireo olivaceus
Often hosts cowbird chicks

Accipiter cooperii
Hunts adult cowbirds

Melanoplus differentialis
A key part of their insect diet
Feathered describes animals, primarily birds, possessing a covering of feathers.
Social animals live in organized groups, cooperating for survival benefits such as foraging, defense, and raising offspring.
This trait identifies organisms whose diet includes both plant and animal matter.
Grassland habitats are terrestrial biomes dominated by grasses and herbaceous plants, supporting a variety of grazing animals.
Diurnal animals are primarily active during daylight hours, typically resting or sleeping at night.
Describes a species whose presence and role have a disproportionately large effect on its environment.
Migratory animals undertake seasonal movements from one region to another, typically in response to changes in climate or food availability.
This trait describes organisms that live on or in a host organism, obtaining nutrients at the host's expense.
No aliases listed yet.
Danger
1/5 · Very low
Enjoy watching birds from a distance and don't try to touch or catch them.
16-22 cm
30-36 cm
0.03-0.06 kg
2-8 years
40 km/h
These adaptable birds eat lots of seeds and juicy insects, finding food wherever they can!
Grasslands
Foraging
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New Hampshire, US
You might spot Red-Tailed Hawk, Northern Cardinal, and Chipping Sparrow.
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Pennsylvania, US
You might spot American Bullfrog and Allegheny Monkeyflower.
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Wisconsin, US
You might spot Partridgeberry, Bluebead Lily, and Cinnamon Fern.
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British Columbia, CA
You might spot Bigleaf Maple, Western Sword Fern, and Vanilla Leaf.
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Washington, US
You might spot Western Fence Lizard and Mule Deer.
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Connecticut, US
You might spot Monarch, Common Milkweed, and Common Blue Violet.
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