Mueller’s Stag Beetle - Phalacrognathus muelleri
This beetle is found only in the rainforests of the Wet Tropics
and is considered one of the world’s most beautiful beetles
due to its size and dazzling colours of metallic green, gold
and purple. Mating rituals are quite dramatic. The female’s
scent attracts males who then use their long curved
mandibles in combat. The losing beetle makes a hasty
retreat. (Length 35-70mm)

Source: www.wettropics.gov.au