Buff-leaf hawkmoth larvae and pupae hiss by forcing air through spiracles, using breath-powered sounds to deter predators.

What might be mistaken for a waterslide in this image is actually the breathing tube, or trachea, of a dragonfly. This tube connects to openings in the insect's exoskeleton (outer “shell”) called ...

Rather than rely solely on passive diffusion, insects use discontinuous patterns of gas exchange to avoid the toxic effects of oxygen, according to researchers at the University of California, Irvine.