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Lucanus capreolus (commonly known as Reddish-brown Stag Beetle) is a beetle of the Family Lucanidae. The species name "capreolus" is derived from Latin, meaning "Roe Deer" ("capreolus" literally means "little goat"). The name refers to the resemblance of the antennae to deer antlers.
It lives in deciduous forests and adjacent areas in the Eastern United States and some parts of Canada. Could be found around decaying logs and stumps, where it breeds. Males use mandibles to fight at breeding sites. Eggs are deposited in rotting wood. Larvae live in decaying wood of deciduous trees. It is reported that larvae take two years to develop, and pupate in nearby soil.