Flights of Fancy, Richard Dawkins

• Bats evolved with echolocation to locate flying prey, increasing their sampling frequency of clicks as they home in on a target. Moths evolved ears tuned to just the right pitch to hear bat shrieks
• Moths may be furry to dampen the acoustics sent out by bats. Likewise, moths have small fork-like scales on their wings that resonate with bath ultrasound in such a way to disappear off the bat radar
• Insects move their wings via a hinge-like mechanism on the upstroke, pulling the hinge down so that the wing moves up. To generate the downstroke, a muscle erects the thorax, lifting the thorax up so that the wing pulls down
• Within a bat’s webbing are rows of thin thread-like muscles, thought to be derived from the same muscles that all mamas have in their skin for erecting hairs, such as when we get goosebumps. Goosebumps are a remnant feature from when our ancestors had more hair, erecting hairs when we got cold to trap warm air within the layer of hair. Getting goosebumps has also been shown to stimulate more hair growth in mice, acting as a signal to generate thicker coats to protect from the cold