by Keith Bancroft, Water Conservation Specialist Supervisor
|California fuchsia in Harvey’s Garden,Tiburon (photo by Keith Bancroft)
A few weeks ago, I was perusing the aisles of my local nursery when I came across a dozen or so containers of California fuchsia. This is a plant I have wanted to add to my garden ever since I saw a wonderful patch of it in Harvey’s Garden at Blackie’s Pasture
As I was sorting through the containers to find the healthiest looking specimens, I noticed a very large green caterpillar on one plant. I didn’t know what type of caterpillar it was, but I decided to take it (and the fuchsia it was on, of course) home to my garden. When I pointed out the caterpillar to the sales person she took a quick look at the horn on its tail and said, “Oh, you should kill that—it’s a tomato hornworm.”
|Top: Tomato hornworm (photo by Oreen Delgado). Bottom: White-lined sphinx moth caterpillar (photo by Keith Bancroft)
I’ve never had hornworms on my tomato plants, and I didn’t have any desire to bring one home to take up residence, but I was hesitant to squash this little guy before knowing definitively just what it was. So, once I got back home, I searched the internet and found that, although it was a hornworm, it was not a tomato hornworm. It didn’t have the tell-tale white stripes across its body.
At that point, I knew what it wasn’t
, but I still didn’t know what it was
. After a few more minutes of searching, I found it appeared to be the caterpillar of a white-lined sphinx moth
. This hornworm doesn’t usually cause any significant concerns for most gardens (unless their numbers are excessive). As an adult, this moth is sometimes mistaken for a hummingbird as it hovers over flowers drinking nectar, and thus its nickname “hummingbird moth.”
This experience demonstrates the importance of recognizing that there are a variety of critters in our gardens—some beneficial, some harmful—and it’s often difficult to identify or otherwise tell the difference between them. I believe it’s best to err on the side of caution and make sure you know what you’re dealing with before making the decision to dispatch them, lest you become the biggest harmful critter in your garden.
A few hours after completing my internet detective work, I went out to plant the fuchsia and found the caterpillar was gone. Perhaps a bird made a meal of it. I prefer to think it crawled away to start the next stage of its life—they burrow just below the soil's surface to pupate and then reemerge as a moth. I’ll be paying closer attention to the hummingbirds in my garden over the next few weeks, and I hope to find an imposter amongst them.