urbpan: (dandelion)

The last two in the project were flies pretending to be wasps. Hard for this one to pretend to be anything but what it is--the largest wasp in the northeast, or at least the longest. That thread protruding from her abdomen is her ovipositor, and it brings her length to about four inches. This is the giant ichneumon Megarhyssa macrurus. She'll stab that thing into a rotting stump right into the body of a pigeon horntail larva and deposit her egg. Her baby then feeds on the horntail baby and, as they say, the beautiful cycle of life continues.

Despite her warning coloration and her terrifying (to many people) appearance, the giant ichneumon is not at all harmful to humans.
urbpan: (dandelion)
 photo IMGP3086_zpsb4facnsf.jpg
This ichneumonoid wasp is the test subject for my use of the bugalien bug catcher. It's a clear plastic pac man that you clomp over the insect or spider you want to catch. So far it's only worked for me for relatively large and slow bugs.

 photo IMGP3085_zps9z5ouf96.jpg
I like that it allows you to catch and release beneficial insects like this one without harming them. Although you could easily mishandle the clomper and maim a bug in the attempt to catch.
urbpan: (dandelion)
 photo IMG_0027_zpskfdpfjuk.jpg
How come a wasp shows up at a moth night? This particular type of parasitoid ichneumonid* wasp is nocturnal, and has a history of appearing at porch lights. It flies at night looking for sleepy caterpillars. You can see this one cleaning its very long antennae--doubtlessly important for finding its hosts. It penetrates their hide with a short sharp ovipositor, and places an egg within. The wasp grub consumes the caterpillar, depriving the world of a moth but giving us another glorious orange Enicospilus** wasp.

 photo IMG_0014_zpsomlmm43l.jpg
This one, not content to land on the lighted sheet, landed on the light itself.

* "tracker"

** Boy can I find nothing at all about the apparent nonsense word "Enicospilus."
urbpan: (dandelion)
 photo IMG_3279_zps7534c675.jpg
We went for a walk in the morning to look at the neighborhood of Magnolia--we hadn't really seen it in the daylight.
Read more... )
urbpan: (dandelion)
 photo IMG_3051_zps26fe41f8.jpg
A sudden change in weather, from drought conditions to thunder and downpours, is bound to make some different living things pop up here and there. Here is a fresh fruiting body of Polyporus alveolaris, the hex-polypore, on a twig of shagbark hickory.
Read more... )
urbpan: (dandelion)
 photo IMG_2236_zps457c0206.jpg
This pigeon horntail Tremex columba was on my desk when I came in one morning. It was in a urine specimen cup with a note that it had been found in one of the barns. I suspect that this harmless insect was mistaken for a stinging insect and killed. Still I'm glad to get the sample, since I've never seen one of these before.

That alarming-looking spike sticking out the back of the animal is not a stinger but a stout ovipositor the female uses to deposit eggs into wood. In the process she also introduces the fungus Cerrena unicolor into the wood. The fungus digests the wood, allowing the larva to feed on the now-softened substrate. The larva is pursued by yet another harmless yet terrifying-to-most-people creature, the giant ichneumon Megarhyssa macrurus. I've received reports of "four inch long wasps with stingers as long as their bodies," an absurd exaggeration. The giant ichneumon is about two inches long, and that's not a stinger it's an ovipositor. She also drives it into the wood, but deposits her egg directly into the horntail larva. The ichneumon larva eats the horntail larva alive, and the beautiful circle of life continues.
urbpan: (dandelion)
 photo IMG_17622_zps51b62dce.jpg

In a couple weeks I'm going to be giving a presentation on yellow jackets to our ZooTeens (teenagers hired to work at the zoo for the summer). My primary objective is to turn these young people into my eyes and ears and get early warning about yellow jacket situations before they are hopeless. My secondary objective is to educate them about insects in general and wasps in particular, and get across the idea that these animals are mostly positive actors in our ecosystem, and it's only when you introduce large amounts of human garbage that they become problematic. Perhaps I'm not being totally honest about my primary and secondary objectives.

I haven't decided how deep to get into the subject. I definitely want to describe the differences between solitary wasps, social wasps, and bees, but do I bring up ichneumons, like this beauty here? I think I probably will.
 photo IMG_1762_zps44b7a08c.jpg

Profile

urbpan: (Default)
urbpan

May 2017

S M T W T F S
 123456
78910111213
1415 1617181920
21222324252627
28293031   

Syndicate

RSS Atom

Most Popular Tags

Style Credit

Expand Cut Tags

No cut tags
Page generated Jul. 4th, 2025 03:58 pm
Powered by Dreamwidth Studios