I Whip My Caterpillar Back & Forth

We did a check of our bees on Sunday (they are all slacking off this summer). Under the roof of one of our hives was this caterpillar:

This isn't just a cute looking inch worm posture, this was a threatening posture.  This is one of the most badass caterpillars I have ever come across.  It's not unusual for us to find other bugs inside an active hive.  Lots of spiders, daddy longlegs, ants and caterpillars work their way up to the shelter of the roof of the hive.  As long as they stay out of the honeybees' way, no one gets killed and mummified in propolis.  But when I find buts, especially caterpillars, I usually move them out.  This particular caterpillar did not want to go gently.  Check out this video I took of it (you will hear both me and Non Birding Bill in the background):

[youtube]http://www.youtube.com/watch?v=5glrrpWFzhY&[/youtube]

What the frickity frak was that all about??  It's a defense posture.  Something comes up to try and eat the caterpillar and it goes all Tom Cruise crazy and the potential predator thinks, "Yeah, maybe not."  We've seen caterpillars have some pretty interesting displays.  Back when I ranched some black swallowtails we made a video of their defense--they whip out horns of stinkiness:

[youtube]http://www.youtube.com/watch?v=vj1jNu3aEDc[/youtube]

I think the caterpillar we found in the beehive is from the subfamily Hypeninae--although any bug experts can feel free to correct me, I'm not CaterpillarChick.  But reading in my  Caterpillars of Eastern North America Guide, it comes the closest.  Also in the Remarks section for Green Cloverworm it reads, " Like other hypenines the caterpillars hurl themselves from their perch when disturbed, by rapidly contracting and twisting their bodies in a fashion reminiscent of tightly wound rubber band."

Ah, Nature, you never cease to entertain and educate me.

Tent Caterpillars

As I have been traveling all over the state this spring, I've noticed a few tent caterpillars and webs on trees.  Two nights ago, I noticed a large mourning cloak caterpillar and thought I might put up a reminder about these different species.

Here's a sample of a bush that I found last week that is covered in webs of the eastern tent caterpillar.  These emerge from eggs and the caterpillars form a tent in the crotch on a branch.

The caterpillars leave en masse from the tent to feed and then return to digest.  The tent serves as some predator protection and also as a green house to keep the caterpillars warm and aid in digestion.  I like to watch these tents during migration, sometimes you can find a yellow-billed cuckoo or black-billed cuckoo tearing in to one and gorging on the ample food source.

When the hundreds leave the tent to feed, you might see them crawling all over on the ground.  These two were on one of the walkways at Jeffers Petroglyphs, but I saw quite a few eastern tent caterpillars along the Minneapolis Greenway on Saturday...not faring too well either with the number of riders that were out.

This is a photo from the Vermont Division of Forestry of a cluster of forest tent caterpillars...which do not spin a tent like the eastern tent caterpillars do.  They do make a silky sheet to molt under, but according to my Caterpillars of Eastern North America they do not make the tent and use their silk the same way that eastern tent caterpillars do.  They do have a tendency to cluster on the side of a tree and could fool people into thinking they are mourning cloak caterpillars.

These are mourning cloak caterpillars that I gathered on the bike trail last summer.  The female butterfly lays eggs en masse on the host tree and the caterpillars feed in a large cluster as they grow.  When it's time to pupate, large groups will exit the tree--resembling the tent caterpillars.  Last year, when I posted my photos, some people commented and emailed me that they had those and were told they were tent caterpillars or gypsy moths and that they should be exterminated.  These guys might eat all the leaves off a branch but they will not strip a whole tree.  Plus, they turn into gorgeous butterflies (that hibernate over winter--how cool is that).  Also, these guys do not make tents, they do not leave a silk trail or make a silk sheet for molting.

People tend not to care for tent caterpillars  because of the caterpillars can reduce the growth their host trees.  I'm ambivalent about them--they are a great source of food for wild birds.  But many understandably call exterminators to deal with tent caterpillars.  Make sure you know your caterpillars before you call your exterminator.  Not all exterminators seem to know their caterpillars.  If you see red spots on the back of the caterpillar and it has a "spikey" look, that could be a mourning cloak.

Swallowtail Caterpillar Shedding Its Skin

Okay, time to get back to blogging as usual. I'm currently on my way to some interesting travel. I'm on my way to Rhode Island and will be here for a few days and take a side trip to Cape Cod, then come back to Minneapolis late Friday night and leave Saturday morning around 7am for a whirlwind jaunt to South Dakota.

In the meantime, it's Butterfly Ranchin' time at Chez Stiteler and below is a video of a black swallowtail caterpillar shedding its skin:

We now return to your regularly scheduled programming

Sharon comes home today. Normal blogging will resume shortly, along with your daily recommended allowance of Brown Birds.

First, a bit of housekeeping:

To celebrate Sharon's return, we're having a bit of a sale over at the Birdchic Boutique. We're clearancing out our remaining Birdchick shirts for ten bucks each, plus shipping and handling (no, not the Disapproving Rabbits shirts). Get 'em while they last!

Three of the Monarch cocoons turned black overnight, which means they'll be emerging soon. Possibly today!

Thanks to all of you for your kind words during my guest stint (I typed "stink" there. Paging Dr. Freud!). Sharon tells me that she has an interesting post about bald birds coming up, right after she goes back and corrects every single inaccurate thing I wrote in her blog.

So long, and for god's sake, stop driving while birding!

Whoop tay yai-yay

When Sharon took off on her trip, she left behind one of the cameras she uses for digiscoping, a Nikon CoolPix 4500. It's got two very interesting things about it: one, it's capable of taking absolutely stunning close-up ("macro") shots, and two, it was forged in the fires of Hell by Lucifer himself.

They don't talk much about that second one in the promotional material.

I'm trying to explain why this post, about caterpillars, will only have two pictures in it. No matter how hard I tried, I simply could not get this camera to focus on what was right in front of it. But the CoolPix and I have bad blood between us, ever since I tried to shut off its time-delay function, which was apparently near and dear to its cold, black heart. The manual was less than useful: "To counteract time-delay function: Do not. Will cause universe implosion. If such effect is desired, please shift yourself into a parallel dimension first, and speak to the Vortex Warlock for further guidance."

So, then, caterpillars!

As you probably know, every year, Sharon "ranches" Monarch caterpillars, growing them inside a mesh container until they're become full-fledged butterflies and be set free.

This year she's ranching Black Swallowtails as well, which are a lot harder to break to the saddle, let me tell you. Also, they come from darker eggs, which means Mrs. Olson won't give us as much for them.

Ahem.

Anyway, the swallowtails are interesting: as Sharon pointed out earlier, in their initial form they're colored to look like bird poo, then look more or less like Monarchs, but when they cocoon, their chrysalis looks more like a Metapod.

Note the two silk strings attached, and the funky wood-like coloration. The other Swallowtail is green like a Monarch chrysalis, however. I'm not sure if this a natural variation, someting to do with age, or health. At any rate, it looks pretty cool, don't you think?

And it is chrysalis city in the Monarch ranch, here. We've already got about eight in cocoons, two more about to assume the J position and get started metamorphosizin', and a couple more big fat cats munching down milkweed as we speak. Soon I'll have to rope 'n' brand 'em, which is much harder than you think, seeing as the branding iron is so small.

In fact, in the time I spent off yesterday, bee-tending, they had eaten the milkweed down to the stalk and were subsisting on dead leaves on the bottom of the container. Eep! I'm sorry guys! I didn't know you'd be so voracious. I'd think you had a tapeworm, except that, well, you're a lot smaller than tapeworms.

Prowling through the street looking to feed the cats hungry for an angry fix, I left the house first thing this morning looking for milkweed, which like Scotch tape and a corkscrew, is something you trip over constantly until you need it. What must I have looked like at 7:30 a.m. on Sunday, walking the streets, my eyes glued to the edges of lawns and medians? A burglar? A drunk, staggering home? Or worst, a birder?

Ah well, I found what I was looking for, stuffed it in the container, and rustled up the cats onto the leaves, where, after a lot of exploration, they started happily munching away. I could tell that one stalk wasn't going to be enough, so later in the day I walked the Greenway for a bit, making myself a menace to the bikers as I scanned the wild growth.

Bikers, I apologize. I had hungry insects to feed, and, frankly, "On the left!" really confuses me, which I recognize is a personal problem. See, if you just ring a bell, I can generate a Pavlovian response that tells me I should dodge to the curve nearest the side I'm on. But when you say "On the Left!" First there's a shock of hearing someone bark at me, then I realize there's a person on a bike closing on me, then I have to think "Do they mean they're coming on my left, or that I should move to the left," which is really stupid, I know, because you're not saying "to the left," but there you are.

Plus, in that split second of minor panic, it takes me a second to remember which side the left is. So my natural instinct is, deerlike, to freeze in the middle of the path just so I can be certain I'll get creamed.

Anyway, some green, sluglike creatures get to stuff themselves, so that's okay.

ANOTHER PRIVATE MESSAGE TO SHARON. PLEASE DO NOT READ THIS.

Dearest Heart,

Glad to hear that you're enjoying your trip, however I find it distressing that you won't tell me where you are or when you're coming back. And why do I hear laughter and Mariachi music in the background?

I miss you. The birds do, too, apparently, because just today I saw a flock of Goshawks fly right by our window.

Warmest regards,
-NBB

END PRIVATE MESSAGE.