I discovered a cicada almost molted, but having trouble on a windy day.
Tag Archives: insects
We are all familiar with the late summer drone of annual cicadas, but around here we also have periodical cicadas. Cicadas that live underground for many years before surfacing for a few short weeks en masse, with such quantity and deafening noise as to make you think an invasion has occurred.
This year it is Brood V. They come out every 17 years. The last time they arrived my kids were little and completely fascinated with all the empty exoskeletons. We had quite a collection. Here is a little look at what has been going on in our yard this month.
Cicadas begin life as an egg laid in the soft wood of trees where they feed on tree fluids. Once they are about the size of a grain of rice they drop off the tree and burrow into the ground to spend years feeding on tree roots.
Here are some bits and bobs:
While cicadas won’t bite you, they do, however, suck juices from the tips of the trees causing them to die off. This is called flagging. I have a young Amelanchier laevis in a pot and this what part of it looked like after the cicadas got done with it.
I’ll have pictures of a freshly molted cicada for you in my next post. In the meantime if you want more in-depth information here are two sites I really like: Magicicada and Cicada Mania. Cicada Mania even has t-shirts and mugs for sale for the cicada enthusiast. 😀
So I walked into the bathroom the other day and found this on the window:
I grabbed my camera and got the shot, but I wanted more. I took the screen off the window (yes, they are on the inside of the freakin’ windows – don’t get me started) and very slowly cranked open the window. Wow. It looked like something from the age of the dinosaur. But I couldn’t get a good picture so I started to reach out and pick it up. Fortunately, I hesitated when I saw its ‘beak’ and grabbed a fish net just to be safe. In researching these guys I found out that their bite is more painful than any hornet or wasp. And because the saliva contains toxic enzymes that paralyze and liquefy the bugs they eat, you can wind up with swelling and numbness and a bite that can take weeks or months to heal. Yikes!
After coaxing it into the net I took it out on the porch for pictures. It wasn’t too keen on side shots, but I did get this one which helped enormously in identifying this bug.
The Wheel Bug (Arilus cristatus) belongs to the family Reduviidae. It is a true bug, the largest of the assassin bugs, and found nationwide. There is only one generation a year. The females are larger than the males and it isn’t unheard of for the female to eat the male after mating. Eggs are laid in the fall on a low bush twig or on a tree trunk in a hexagonal cluster of 40 – 200 eggs. Wheel bugs overwinter as eggs and hatch in the spring. Nymphs are about ant size, red and black, and do not have the ‘wheel’ on their backs. Like the adults, they are also predators.
This photo is from http://bugguide.net/node/view/48139 (Love this site!)
|Copyright © 2006 Jim Kramer|
Wheel Bug (Arilus cristatus) Eggs (First Out) – Arilus cristatus
April 16, 2006
It takes the nymphs roughly three months and 5 instars (molts if you will) to reach adulthood. That is why these bugs generally don’t come to anyone’s attention till the end of summer, most particularly in the fall.
Wheel bugs are top of the line predators. Having them around is a signal that your yard is a healthy ecosystem with an intact food web. In other words, lots of good things to eat and no poisons. They are mostly diurnal but the clever ones will figure out coming to your lights to hunt at night will give them easy prey. The kill is usually ambush style with the wheel bug lunging forward to grasp its prey with its front legs while plunging its long beak into the prey’s soft parts and injecting the enzymes that paralyze and kill it, usually within 15 to 30 seconds. The insides of the bugs are liquefied by the enzymes and sucked up through the wheel bugs beak. (Yuk.) While the wheel bug helps us out eating pest bugs, they will also snack on so-called ‘good’ bugs if that’s what’s available. The really nice thing about these guys (particularly for me here) is that they are able to prey on the well-protected hairy caterpillars that defoliate the trees. Yay!
Remember, these are ‘GOOD’ bugs even if they look a little intimidating at first. So NO SQUASHING! 🙂