stag beetle

US /ˈstæɡ ˌbiːtl/
UK /ˈstæɡ ˌbiːtl/
"stag beetle" picture
1.

a large beetle, the male of which has large, branched mandibles resembling the antlers of a stag

:
We saw a magnificent male stag beetle in the forest.
The children were fascinated by the large stag beetle they found.