Excerpts from Jim Conrad's
Naturalist Newsletter

from the May 5, 2007 Newsletter issued from Sierra Gorda Biosphere Reserve, QUERÉTARO, MÉXICO
VISITED BY A ROSEBELLY LIZARD

One hot, sunny afternoon this week as I worked at the computer and cicadas made a real racket in the Sweet Acaias, I heard the pattering of tiny feet as something streaked through my open door, ran across my concrete floor and my bare feet, and tried to climb up the wall beside me to reach my window. However, a blue, plastic shopping bag lying below the window had to be surmounted, but the bag was too smooth to climb. The creature just spun his wheels noisily until he gave up and lay there in a nest of blue plastic looking up at me as if to say, "OK, I'm a lizard, and I'm in a mess... "

I was tickled with this visit because I've been wanting a close look at this species. Back during the cooler months I saw lots of plain-looking lizards whom I identified as Mesquite Fence Lizards. One of those is pictured curled up cold-stunned on the adobe oven at http://www.backyardnature.net/n/07/070223fl.jpg.

Now that it's much hotter and drier, the main lizards I'm seeing are a different species -- much more boldly striped, and longer. My visitor was this new species. By the time he'd recuperated from trying to climb the blue plastic bag, and begun wandering across my floor, I had my camera ready. Below, you can see the resulting picture, taken right beneath my chair.

Rosebelly Lizard, SCELOPORUS VARIABILIS

This wasn't the first time I'd tried to photograph this species. Just a couple of days earlier I'd been walking along the reservoir when a male appeared atop a white limestone rock holding his head so high that at first I thought he was chomping on a golden-winged butterfly, with a wing bent downward at each of his mouth's corners. But then I saw that the "wings" were the lizard's belly patches. Here was a male full of hormones displaying from a spot where the whole world could admire him, especially females. When I reached for the camera, he jumped from the rock and streaked across the road.

These hot-weather lizards appear to be Rosebelly Lizards, SCELOPORUS VARIABILIS, distributed from southern Texas through eastern Mexico to Costa Rica. A website in Texas describes males as having "two pink belly patches partly rimmed in dark blue which extends onto sides of body to form dark spots in armpit and in groin." What I saw was golden, not pink, so who knows what's going on?

Why did this lizard rush into my room and try to reach my window on the other side? I learned the answer to that while my visitor still lay atop his blue, plastic bag. Another lizard of the same species, apparently having chased my visitor into the room, appeared at my door's entrance, wouldn't enter, but definitely glared in our direction. I'd guess that my first visitor was either a female trying to escape a too-persistent suitor, or a low-ranking male being driven from the other's territory. Probably the latter.