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Wiktionary
chicken turtle

n. An uncommon freshwater turtle found in the southeast of the United States, similar in appearance to the Eastern painted turtle but with an unusually long, striped neck, a yellow stripe on each of its legs and a net-like pattern on its carapace.

Wikipedia
Chicken turtle

The chicken turtle (Deirochelys reticularia) is an uncommon freshwater turtle found in the southeast of the United States. It is in the monotypic genus Deirochelys.

The name "chicken" turtle refers to the taste of their meat, which used to be popular in southern markets.