Stephen Dalton / Least stag beetle (Sinodendron cylindricum) front view, Sussex, England, UK, May.

Stephen Dalton / Least stag beetle (Sinodendron cylindricum) profile, Sussex, England, UK, May.

Stephen Dalton / Least stag beetle (Sinodendron cylindricum) portrait, Rookery Wood, Sussex, England, UK, May.

Nick Upton / Rhinoceros Beetle (Sinodendron cylindricum) male walking on a moss covered tree stump, Nottinghamshire woodland, UK, June.

Chris Mattison / Rhinoceros beetle (Sinodendron cylindricum) female. Sheffield, May. Focus-stacked image

Chris Mattison / Rhinoceros beetle (Sinodendron cylindricum) male. Sheffield, UK. June.