We found ourselves surrounded by these while in the Western Sayan Mountains in Khakassia, Russia in mid August. They climbed over our handlesbars, had sex on the panniers and when they flew into our hair, got tangled and panicked, they drew blood with their mandibles!
The males have the longer horns:
This is a female:
Two males fighting:
Beetles Butterflies and Moths Caterpillars Flies, including Dragonflies Grasshoppers and Crickets Other insects (Preying Mantis)
Insects Spiders Centipedes and Millipedes Mammals Birds Amphibians Reptiles Crustaceans Flowers Fungi