FieldMarking

January 21, 2008

Fantastic discoveries

Filed under: indirect observation, plant — cyndy @ 9:07 am

The media sure love an extreme story. Don’t we all? Last week we got exploding palm trees from Madagascar and gargantuan rats from Uruguay.

The palms, Tahina spectabilis, appear to be a bit odd. Rather than the grow-fast, reproduce-massively, die-young of most r-selected species, these plants grow slowly, reproduce once, and then die old. A single massive breeding event after about a hundred years (during which it becomes the “tallest tree of its type” in the forest) totally exhausts its resources. Apparently they have been overlooked because there are so few of them, perhaps a hundred individuals. I wonder whether they are all the result of a previous breeding event, or if there are a variety of ages. I’m sure there’s interesting population modeling being done to figure out how they can continue to persist. Certainly there is interesting biogeography, as its relatives occur in the Middle East, Thailand, and China.

The fossil rat is more accurately described as a hippopotamus-like guinea pig. Its skull had been languishing in a box in a museum for a couple of decades. One hopes that with its description more can be sought and found, so that there’s more than an n of one to work with. Pedant that I am, I note that the New York times has not properly italicized its scientific name, Josephoartigasia monesi. If they can’t do that, how will they ever embrace microformats?

Spam is depressing

Filed under: blogging — cyndy @ 8:33 am

According to Akismet, we’ve had more than 12,000 spam comments here at FieldMarking. Very rarely something real gets misclassified — far less often than in my email, but nonetheless I have been checking it before deleting. I’m going to stop doing that. I just can’t even stomach the task of skimming it anymore. So if you ever leave a comment that doesn’t show up, drop one of us a line and we’ll be sure to retrieve it or help you get it past the spam filters.

January 3, 2008

The tale of Antoinette

Filed under: observation, phenology — cyndy @ 11:05 am



Ant Lion - Home Sweet Home

Originally uploaded by Clearly Ambiguous

Back in July, my son was in an entomology summer camp. While out on a daily field trip another camper spotted some ant lions and explained they can be kept as pets. So, we’ve been keeping an ant lion, dubbed Antoinette, in an aluminum pie plate filled with sand.

For the first time we actually looked forward to finding ants in the house. While carpenter ants were easy for us to catch and toss in, I was never sure if Antoinette was able to suck much juice out of them given their seemingly tough exoskeletons. She typically made short work of medium or small ants from the yard or driveway.

With the onset of winter things started to look grim. We could no longer find any ants either inside our house or out. Yet Antoinette patiently waited. I worried about her dying, and she played dead if I dug her out. But she always returned and made a tidy little pit, sitting for hours and days with her mandibles at the ready.

I ordered some ant farm ants from an online vendor. To my dismay, the harvester ants that arrived had nasty, nasty mandibles, long capable legs, and attitudes the size of Texas. After her first scuffle, Antoinette appeared to dig her head further into the sand if one appeared, even if I knocked off the edge by a minute or two in the freezer. Never was sure if she injested anything before she tossed them out of her pit.

I started cruising all the likely indoors places I could think of that might harbor ants. There used to be quite a few where the toddlers would drop their Cheetos at the local indoor pool. Alas, they’ve started putting out ant traps and don’t have a problem anymore (not that they would admit). I visited a few greenhouses at hardware stores. Lots of house sparrow feathers and seed debris reminded me of free-loading hobos, but no ants.

Finally a number of small ants made the mistake of wandering about in our upstairs bathroom. Fed her three or four ants in one day.

Then the next day, yesterday, her always-tidy pit was in disarray. I dug her up to see if she was there, and I believe she’s finally pupated. There’s a ball of sand not too much bigger than she used to be. We’ll have to transfer her sand to a jar we can cover, so that when she transforms to an adult we’ll get to see her before she flies away.

Ant lions are in the family Myrmeleontidae, in the order Neuroptera. I’ll add links and more photos as I have time.

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