a close-up view of a female robber fly in the genus efferia after capturing a grasshopper in colorado

efferia entomologist animal behavior arachnids arthropods biodiversity biology close observation colorado ecological balance interaction ecosystem entomology environmental science field study food chain grasshopper nymph habitat hunting insect identification insectivorous landscape natural history nature enthusiasts lovers outdoor adventure predation predator prey research robber fly sandy ground seasonal activity species sunny day wildlife closeup view female genus capturing predatory grasps