Hornworm is a name given to the larvae of a group of species known as sphinx moths. The name comes from the horn like projection found at the back end of the caterpillar. I found this guy as I checked on the garden on my way to the
woods. This is the Tobacco Hornworm,
perhaps my favorite of all caterpillars.
Some of my earliest recollections are of finding caterpillars like this
stripping leaves from our garden tomato plants.
If undiscovered by parasite and predators, it is destined to become a
Carolina Sphinx moth.
It pulls in its head and legs when disturbed and at a
glance, looks very much like a natural part of the tomato plant. When I was eight years old, I was the kid
people called to remove these giant monstrosities from their tomato
plants. I was happy to oblige. I don’t think they would have appreciated the
fact that I took the caterpillars home and raised them to the adult moth
stage. Fortunately for me, we lived in
an area where the species was double brooded, which meant that the early
caterpillars that I collected transformed to adults without having to go
through the winter. I released the
adults in our back yard and am sure they headed for the neighbors garden to lay
more eggs.
As I entered the woods, I found a different species of
hornworm. This is the caterpillar of the
Laurel Sphinx. The colors are clear and
bright when viewed close up. At a
distance, the caterpillar is almost impossible to see. Green, yellow and black are the colors of a
summer woods and this caterpillar blends right in.
I was especially impressed by the yellow bands around the
legs looking like a brightly colored set of spats.
What at first appeared to be a mottled pattern on the back,
turned out to be wounds created by exiting Braconid Wasp larvae. The caterpillar suffered massive internal
injuries inflicted by the feeding wasp larvae and will not live long enough to
pupate.
I found a third species of hornworm feeding in a thicket of Virginia
Creeper. This is the caterpillar of the
Virginia Creeper Sphinx.
There turned out to be several of the caterpillars in this
patch of Creeper. Most were hidden
beneath the leaves, but this individual was on the move to a new feeding
location. All were this same pale green
color which made them easy to spot against the darker green of the Virginia
Creeper leaves.
The small head and forward segments ballooning into the
large body is a characteristic of this species.
There are many more hornworm species I have yet to encounter, but I felt
particularly fortunate to see three in one afternoon.
Happy Birthday to Sarah and Sophie
16 hours ago
Excellent site - thanks to you, I was able to identify two Virginia Creeper sphinx caterpillars. Thanks!!
ReplyDeleteHi, Kristin. I'm glad you found the post helpful. Hopefully you'll find some more interesting species of hornworms.
ReplyDeleteAre they poisonous to us?
ReplyDeleteHornworms are harmless.
Delete