Stag beetle and ground (Polygon mesh 3D model) is available on CGTrader for $12. Original author: DeakCP. Specs: 3888628 verts.
Native Formats: BLEND (Blender, filesize: 362 MB)
Exchange Formats: OBJ (OBJ, filesize: 464 MB), STL (Stereolithography, filesize: 349 MB)