These are called effigy mounds.

Webonly a small percentage of the earthworks built by the adena, hopewell, and fort ancient cultures are effigy mounds, or earthworks in the shape of animals and birds.

Webthe most striking mounds are the 31 built in the shape of animals, most commonly birds and bears.

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Common shapes for effigy mounds include birds, bear, deer, bison, lynx, panther, turtles, and water spirits.

Webeffigy mounds, earthworks in the shape of animals and birds, were raised in north america in areas that now correspond to parts of wisconsin, minnesota, illinois, iowa, and ohio.

The largest, called the great bear mound, is 137.

Effigy mounds can be found throughout the north.

Weban effigy mound is an earthen mound in the shape of an animal.

Weban effigy mound is an earthen mound in the shape of an animal.

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