urbpan: (dandelion)
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The yellow bear Spilosoma virginica* isn't nearly as well known as the woolly bear, but is nearly as widespread. The caterpillar has longer softer 'fur' (setae) and is usually all yellow (but darker forms occur). While the woolly bear is found throughout the late fall and even the winter as a caterpillar, the yellow bear pupates to survive the cold months. The caterpillar can host on almost any kind of plant, including a variety of garden plants and trees and shrubs. The moth, the Virginia tiger moth, is a pretty but unassuming white creature.

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*Virginian specked-body
urbpan: (dandelion)
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At first it looks like an extra large woolly bear, that never developed the reddish brown band. Or maybe it died it's brown setae black as a countercultural fashion statement.

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But then when its picked up, it goes into a defensive curl, revealing bare bands of bright red cuticle. It's another warning, but intended for birds and other predators.

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The giant leopard moth caterpillar Hypercompe scribonia can be handled safely by humans. Please don't squish it, as it will change into a lovely white moth with open black spots, and hidden blue and orange colors on its abdomen. The caterpillar has as broad a taste for plants as the woolly bear, and even includes tropical and subtropical plants like banana and orange. The moth occurs from Texas to Minnesota and everything east of that, including some of the Caribbean islands.

* Very shackled good writer (Scribonia is a Roman given name and an opera character--the name suggests the meaning of good writer: Scribo + bonus; the taxonomist was almost certainly referring to the black markings on the white moth, which resemble writing.)
urbpan: (dandelion)
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I've found woolly bears (Pyrrharctia isabella*) in lots of weird places--basically under anything you leave in the yard overnight--but in a small juniper bush? That's new on me. They eat the foliage of broadleaf trees, lots of weeds, and even grasses, but not conifers to my knowledge. Maybe it just went for a walk out on a limb. Woolly bears on the short list--for some people a VERY short list--of insects that people don't really mind. Their protective covering of defensive black and red-brown setae are reminiscent of the pelage of a charismatic mammal. They overwinter in leaf litter and in under loose objects as larvae, ensuring that they are familiar to anyone tidying their property in the fall. Their diet and their ability to survive difficult weather has led them to spread throughout most of North America. Normally I'd tell you not to handle any colorful hairy caterpillar, but I spent half my childhood playing with these, so knock yourself out.
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*In Latin "Pyr" means fire or heat and "arc" means cold (referring to the arctic or the North pole). "Isabella" refers to an isabell color (greyish-yellow). When all of these Latin word parts are pieced together, the name Pyrrharctia isabella is fitting due to the fact that in the larval stage Pyrrharctia isabella has bright orange bands resembling fire, and portrays the isabella color in the adult stage. Additionally, this species is able to survive cold temperatures and is commonly found in arctic regions, thus attributing significance to the "arc" part of it's name.
urbpan: (dandelion)
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A tiny caterpillar cuts lengths of grass stems and binds them with silk into a tube. At the insect's scale it is like a suit of armor made of bamboo. It protects the caterpillars from predators, like wasps and spiders. Look close--it's protecting a small spider from my gaze as well.

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The spider abandons its hiding place, leaving the bagworm in place. This moth caterpillar is almost certainly
Psyche casta*, a European species first noticed in North America in where else but Boston, in 1931.

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* The beautiful Greek word "Psyche" has a double meaning of both "the mind/soul" and "butterfly." In this case, the construction of the binomial comes to mean "moth who builds a fort."
urbpan: (dandelion)
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We've been experiencing a biblical plague of these bastards lately. This is the larva of the winter moth Operophtera brumata*, a Eurasian pest introduced to the east and west coasts of North America. They have a strong appetite for a wide variety of trees and shrubs, defoliating saplings and causing deforestation. Songbirds have a hard time keeping up--while I've seen many robins, starlings, sparrows, and other birds with their bills stuffed with caterpillars--there are still hundreds all over the sidewalks and pathways in the woody parts of the city and suburbs.


* The etymology of this one is a mess, with transcription errors and pseudonyms all over the place. I think the name is supposed to suggest "working wings" (which would be Operoptera) in reference to the fact that males can fly while females can't (that makes sense in the sexist context of 19th century naturalism). Brumata means "of the winter," because these are some of the only moths that fly in the winter in northern places.
urbpan: (dandelion)
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The view of the FP zoo restaurant from behind the door to the dumpsters.

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Ugly cell phone photo of a striped garden caterpillar on the hospital garage door. The half inch mesh (and the 15 squares to the inch screen) nicely measures this larva out to 1.63333333333333 inches long.
urbpan: (dandelion)
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I was frankly dreading today's Fungi Field Walk, because we're in the middle of a drought. I don't think it's rained in over 2 weeks. I expected to find maybe some polypores and perhaps some little forest mushrooms like this one--probably Dacryopinax spathularia.

Read more... )
urbpan: (dandelion)
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Here's half of my mushroom class from last Sunday. I'm getting less shy about saying, when my alarm goes off, "it's three o'clock, I'm going to take a picture then we should head back--if you don't want to be in the picture let me know!"

2 bugs one mushroom )
urbpan: (dandelion)
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I was on my way to lunch one day last week when I caught some movement out of the corner of my eye. A distinctly caterpillary movement, across the thigh of my khakis. When I arrived at my destination I picked up my passenger and got this picture.

This is a moth caterpillar, known as a "filament bearer" (Nematocera). When they are disturbed they can inflate those doo-dads on their back in some kind of defensive behavior. This one seemed pretty calm, not that I would have been deterred by such a display.
urbpan: (dandelion)
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Morticia seems to be busying herself with something. I like to imagine she's playing with her smart phone.

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Up at Stone Zoo, Cornelius has regrown his magnificent rack. The neck muscles he must have to carry that around!

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I've yet to get an identification on this caterpillar found on viburnum, but I'm going to predict that it's a skipper species.
urbpan: (dandelion)
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Sunday was sunny and warm! We stayed in the yard most of the day, doing yardwork (Alexis) and loafing about (me).

Read more... )
urbpan: (dandelion)
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Our last stop on the vacation was the Edison and Ford Winter Estates. I was keen to see the botanical laboratories and such, not so much the big houses of two rich men I don't particularly admire. Edison was a ruthless capitalist and elephant electrocutor and Ford was a noted anti-Semite. We saw some cool stuff there though--check out the tree behind this statue of Edison.

I made sure to show my dad the Oatmeal strip about Tesla, after we got back, just so you know.
Read more... )
urbpan: (dandelion)
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Alexis took the weird-looking puppy, and her kind-of weird looking daughter up to see the family in Vermont. Here's me and the other old man sittin' around the backyard fire after a break in the leaf-raking.

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Raking the leaves turned up this caterpillar--judging by the color and habitat (time and place) I'm guessing it's just an atypical woolly bear.

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urbpan: (dandelion)
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Settin' a spell after doing some yard work and playing with dogs and such. For the beer fans, I'm drinking a Sierra Nevada Summerfest.

Read more... )
urbpan: (dandelion)
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Cottontails are extra visible this time of year--babies are coming out of the nests, and adults are grazing on all the new spring vegetation.
Read more... )
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Striped garden caterpillar Trichordestra legitima

I've complained about common names several times before on this blog, but it's hard to quibble with this one. I found this caterpillar while we were tearing down our vegetable garden for the fall. When I picked it up, it curled into a defensive position, and when I showed it to Alexis she initially mistook it for a striped garden snail. The resemblance was so close that I wondered if it was a case of mimicry, but it turns out this is a native caterpillar, and it is unlikely to have evolved a likeness to a European snail. More likely the curling helps face that lateral yellow stripe at potential predators to convince them that the larva is not edible.

This caterpillar's taste are extremely broad: while in that section of our yard it may have been eating bean plants, violets, goldenrod, aster, cherry, or raspberry. The adult is medium sized brown and gray moth that would have been really frustrating to try to identify, and then more so to learn that the species is named for the larva.

Predators?

Jul. 17th, 2012 10:34 am
urbpan: (Default)
Here are two photos that don't fit into any of my specific projects.


A funnel-weaving grass spider ignores a caterpillar that has fallen into the web. Not vibrating enough? Too big to handle (unlikely, I've seen them grab big grasshoppers)? Some kind of caterpillar defensive chemical? I did not supply the prey this time, the scene is how I found it.


This is the fruiting body of a fungus called Claviceps, growing on a wild grass fruit. I have not encountered this before, so it's pretty exciting. The most famous member of the Genus is C. purpurea which feeds on rye and other cultivated grasses, and causes the disease Ergotism. Among other unpleasant symptoms such as gangrene, ergotism sufferers may experience mania, psychosis, and hallucinations. Some writers have blamed various historical outbreaks of mass hysteria on the fungal disease.
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It wasn't until I posted this pic on Facebook (begging the author of this book for ID help) that I realized the caterpillar is in the picture. The animal that made this beautiful S curve is at the bottom of it, camouflaged by color and body shape. It's an almost imperceptibly small caterpillar. I verified this yesterday by going out to the little tree and finding more caterpillars, now fatter and larger from nine additional days of eating. I also assumed that the little tree was a chokecherry, but I was coached to properly identify it as a black cherry. So much to learn.

EDITED TO ADD:
SO much to learn. This "caterpillar" is very likely a sawfly larva, which is to say, not a caterpillar at all. Stay tuned.
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Weather is especially unpredictable if you are an ant. Sometimes it's brightly sunny, but it's raining very heavily anyway!


Sometimes it also rains winter moth caterpillars, and these are delicious presents for the queen and the brood.

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