a female robber fly in the genus efferia after capturing a grasshopper nymph perched on a branch in wyoming

adaptation anatomy arthropod behavior behavioral biodiversity branch capturing close collection colorado detailed ecological ecosystem efferia entomology environment exploration fauna features feeding female flora fly flying foliage foraging genus grasshopper habitat habitats identification insect interaction lifecycle macro natural nature nesting nymph observation outdoors pair patterns perch perched pollination predator robber role species summer surrounded watching wilderness wildlife world wyoming