Stag beetles are a group of insects belonging to the family Lucanidae. They are known for their large mandibles, which resemble the antlers of a stag, hence their name. These beetles are typically found in wooded areas and are most active during the summer months. Stag beetles undergo a complete metamorphosis, starting as eggs, then larvae, pupae, and finally emerging as adults. The larvae feed on decaying wood, which helps recycle nutrients in the ecosystem. Some species of stag beetles are considered endangered due to habitat loss and environmental changes.