Horace is a dragonfly. He's a minor character, although he and his dragonfly family and friends feature prominently in the last few chapters of the book. I needed to know if dragonflies have a good sense of smell. I took a look on the internet and this is what I found.
An article in Science Magazine explains that, though they lack what we understand as a normal sense of smell, that doesn't deter them from using odors to hunt prey.
Human noses use scent receptors, each of which responds to a specific scent. These receptors send signals to our brain, where they're interpreted as coming from a specific item (a dog, a flower). Scientists have known that dragonflies don't possess these scent receptors, so they assumed they didn't have a sense of smell. New research has determined that they smell in a different way. They have tiny sensory neurons that emitted nerve impulses when the insects were exposed to various scents.
Knowing this, I was able to have the dragonflies in my story use their sense of smell to do some tracking—to locate Horace and Bruce, both of whom have gotten into trouble and are in need of rescue.
Bruce and the Road to Freedom (Book 5 of the Bruce and Friends series) will be out in time for Christmas.