Birds

Photos: Examples of Dimorphism in Birds

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Feathers set birds apart from any other animal on Earth. Plumage has a variety of important biological functions, including social signaling and survival.

Male and female birds can have plumages that look the same, or different.

Differences in size, color, weight, and over all appearance are examples of dimorphism in birds. Birds that do not exhibit key differences in size, color, and over all appearance are considered monomorphic. Below are examples of dimorphism in birds. Take a look and identify the differences.

Wood Ducks

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Male and Female Wood Ducks. Image Credit: Animal Perspectives.

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Male and Female Wood Ducks. Image Credit: Animal Perspectives.

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Male and Female Wood Ducks. Image Credit: Animal Perspectives.

American Wigeon

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Female American Wigeon. Image Credit: Animal Perspectives.

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Male American Wigeon.Image Credit: Animal Perspectives.

Eastern Towhee

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Male Eastern Towhee. Image Credit: Animal Perspectives.

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Female Eastern Towhee. Image Credit: Animal Perspectives.

Hooded Merganser

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Hooded Merganser. Male (L) Female (R). Image Credit: Animal Perspectives.

Ruby-throated Hummingbird

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Male Hummingbird. Image Credit: Animal Perspectives.

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Female Hummingbird. Image Credit: Animal Perspectives.

Tree Swallow

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Female Tree Swallow Building a Nest. Image Credit: Animal Perspectives.

Male Tree Swallow. Image Credit: Animal Perspectives.

Male Tree Swallow. Image Credit: Animal Perspectives.

Northern Cardinal

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Female Northern Cardinal. Image Credit: Animal Perspectives.

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Male Northern Cardinal. Image Credit: Animal Perspectives.

Mallard Duck

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Female and Male Mallard Ducks. Image Credit: Animal Perspectives.

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