How do bats help control insect populations?

Most bats are insectivorous and play a significant role in maintaining the balance of insect populations and potentially controlling insect pests through their massive consumption of insects. While the specific spectrum of species consumed is not fully documented, the sheer quantity of insects eaten by bats is formidable; for instance, Mexican free-tailed bats in Texas are estimated to consume approximately 9,100 metric tons of insects annually.1

Bats identify and track their prey in flight using echolocation. They may intercept large insects with their wing membranes or capture them directly with their teeth. In addition to aerial hunting, some species forage for arthropods—including large insects, spiders, and scorpions—on the ground, on walls, or on vegetation. This heavy predation is significant enough that some moth families have evolved to take evasive or protective actions upon hearing the ultrasonic pulses emitted by hunting bats.2