a female robber fly in the genus efferia insect observed in colorado with a grasshopper nymph

biological efferia entomologist nymph arthropod behavior biodiversity biology close colorado conservation ecological relationships ecology ecosystem entomology environment fauna field study flora grass grasshopper grassland habitat interaction insect anatomy communities identification landscape living organisms natural history world nature enthusiasts observation outdoor exploration predation predator prey robber fly scientific species summer terrestrial visual documentation wildlife female genus observed captured