More than you ever thought you wanted to know about a wee insect, Oak Tree Hoppers -- Platycotis vitiate
Insects! -- what a
fascinating world that we’ve have overlooked most of our lives. Of course we enjoyed the colors of
butterflies, admired the aerial maneuvers of dragonflies, attacked ants in the
kitchen, and treated bees and wasps with due respect; but we never really
looked for insects. The digital camera
changed all that. With the camera we get
to ‘see’ way more about what goes on in their world. It is as if we have a magnifying glass in
hand and the insects let us get really close.
Actually, most of them don’t, but when we pop our photos onto the
computer screen we can see the gleam in their eye and the whiskers on their
forehead.
Oak Tree Hoppers are a good example of our newly discovered
world. I found the first colony because
I now spend some of my time carefully looking along twigs, under leaves, deep
in the grass, and even under out house eves. On Aug 18, 2013 I noticed an alder branch that
looked lumpy.
When I looked closely, I could hardly believe my eyes. This peculiar little bug looked back with
bulging eyes and a whole clan of what looked to be bright
red-black-and-white go carts. We soon
realized the go carts where nymphs and the adult, probably the female, was
protecting them. She looks rather like a
thorn on the branch and is only about a third of an inch long.
About thirty nymphs were spread out along the branch
feeding. They cut through the thin bark
and sip sap …. And frequently poop little droplets of sugary fluid rather like
aphids. A lot of this liquid poop was hitting a leaf about four inches beneath
the hopper family --- and there sat an ant licking up the sugary bonanza.
Three hoppers nymphs grow by shedding their skin when it gets too
tight. When one first emerges it is the
prettiest little white replica of its brothers and sisters, and then gradually
colors up until it looks just like the other nymphs – bold red, black, and
white.
We returned to the alder 17 days later. They were still on the same branch in approximately
the same spot. My, how they had
grown! Most now had wings and were white
with red and black stripes. They were
hump-backed and a few had started to grow a protrusion like their Mama. None of them were dark green like the
adult.
While we watched a
predacious stink bug came along and
later a yellow jacket. Both times the adult leaf
hopper whirred her wings like mad. The
blur of wings was enough to convince
both intruders to leave.
Once home it took me awhile to identify these insects
(Platycotis vittata). One of my favorite
books, Kaufman’s “Field Guide to Insects of North America” only shows white
adults and says they feed on birches. The
wonderful internet guide, www.bugguide.net, shows mostly white Oak Tree Hoppers, but does have a couple photos
of green ones. They expect to find these
tree hoppers on oaks and feels in other sightings they were probably ‘just
resting.’
This last comment piqued our curiosity. We’re quite sure there isn’t an oak tree
within 10 miles of where we took our photographs. The following year we went back to the same
site, wondering if we’d find more Oak Tree Hoppers or if our sighting was just
an anomaly. We couldn’t find any and so
we chalked it up to an anomaly.
BUT this year we looked again. We’ve already found seven families. We’re getting better at looking for those
lumpy branches. Also, amongst our little
library of insect books, I found another reference to them. “Insects of the Pacific Northwest” by Haggard
and Haggard says the female Oak Tree Hopper is dark green and the males are the
white ones. Also they report these tree
hoppers feed on alder, oak and many other broadleaf trees.
Our photo of youngsters that are nearly full grown shows all
the young, winged insects are white. I
suspect all young tree hoppers are white and turn color with age. Possibly the males stay white and only the
females darken.
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