Miyama stag

The Miyama Stag.

In
Like all fish and bugs in Animal Crossing, the Mountain Beetle can be donated to the museum by talking to Blathers, the curator. He will tell the player some information about it when the player donates it.

In
Blathers will say this upon donation to the museum:

It can be found on the back terrace of the insect exhibit, on the third tree from the right.

In
When donated in, the Miyama stag can be found in the right-hand back room of the bug exhibit, on the southernmost tree on the right side of the room. The exhibit has this to say about the Miyama stag:

Real-world information
Lucanus maculifemoratus, also known as the Miyama stag beetle or Miyama kuwagata is a beetle found in Japan, thus the Japanese name. It is popular among children, because it is seemingly harmless and does not mind being touched. As stated in the "Bugs and Fish" window in (also known as Encyclopedia), it has a distinctive shape of head, and although it looks strong, it is in fact quite delicate, which might be why it is popular with children. It is found in mountainous areas in northern Japan, as well as natural forests.