This is a description of the Stag Beetle, a species of beetle found in many parts of the world. It is a large beetle, with males having large mandibles that resemble the antlers of a stag. They are usually black or brown in color, and can reach up to
From Wikipedia
Stag beetles compose the family Lucanidae. It has about 1,200 species of beetles in four subfamilies. Some species grow to over 12 centimetres, but most to about 5 cm (2 in).