Cyclommatus stag

The Cyclommatus Stag (ホソアカクワガタ, Hosoakakuwagata), known as the Cyclommatus prior to, is a stag-looking beetle with large mandibles, introduced in. They are found on palm trees and sell for 8,000 Bells. Compared to other stag beetles with a similar price, the Cyclommatus Stag is less easily prone to scaring away; it does not react when villagers walk at full speed to it whereas the Elephant Beetle and Atlas Beetle will fly off. They are found between June and August, from 5 PM to 8 AM.

In
Upon donation to the museum, Blathers the curator will say the following:

After donation, the Cyclommatus can be found on the second tier of the insect section, in the large enclosure on the middle palm tree. This enclosure also contains the rafflesia, Tarantula, Scorpion, and Elephant Beetle, to name a few.

In
After the donation, an information board will display a description of the Cyclommatus stag.

Real-world information
The first impression of the cyclommatus would be the large mandibles which measure up as long as the body, taking up half its full length. It uses these mandibles to fight off other beetles for a mate. The male cyclommatus is a lot larger than the female - the male being around 105mm and the female being 30mm.