Video: This caterpillar mimics the alarm calls of its predators

The North American walnut sphinx moth caterpillar is a bit of a mouthful—both to say, and for hungry birds that love to feast on the juicy insects. However, according to new results presented at the International Symposium on Acoustic Communication by Animals, the caterpillars have learned to mimic birds’ distress calls by forcing air through holes in their bodies with an accordionlike contraction, The Scientist reports. When the birds hear the alarm, they give up the hunt and flee for safety, believing that an even larger predator may be on the prowl for them.