Most insects do smell, and they produce scents for a variety of reasons. One is self-defense, says Jason Dombroskie, an entomologist at Cornell University in New York.

These insects are the largest hornet species on the planet measuring in at about 1.5 to 2 inches and flying in at a speed of up to 25 miles per hour.

Although various bat species eat different kinds of food, the vast majority consume a variety of insects such as moths, beetles, gnats, and crickets. In this respect, the bat's nocturnal behavior ...