Category: All Posts Page 122 of 154

Several days ago, I reported on skeletal anomalies from this year’s trip to the Bahamas and wondered what cool stuff we might see next. Much to my surprise, the next surprise turned up the very next day, in the form of Mexican anole maestro Levi Gray, making his first appearance in the Caribbean. Welcome to the big leagues, Levi!

The next night, Levi strolled down to our place to do some night herping–and wouldn’t you know?–en route the very first Anolis smaragdinus he had ever seen turned out to be of the three-footed variety. Add another example to our parade of limb-reduced anoles.

Later on, while out looking for more greens, we came across this pair of lizards snoozing.

But closer examination shows that that’s not a pair, but a trio, with one anole sleeping on top of another. Now, that’s something I’ve never seen before!

Lastly, my favorite shots of the trip, now finished.

Anolis sagrei. Photo by Jonathan Losos

Anolis distichus. Photo Jonathan Losos

Anolis smaragdinus. Photo by Jonathan Losos

Hello, Anole Annals readers,

I work for the Howard Hughes Medical Institute’s Science Education Department. To support the anole film that Jonathan Losos talked about on this post, we developed a classroom activity to explore the morphology and the phylogeny of Caribbean anoles using photographs and DNA sequences. The resources are available from our BioInteractive.org website.

Students are given color photographs to sort different anole species into ecomorphs. Having grouped the species, they use an online phylogeny tool to build a phylogenetic tree from the DNA sequences from the same species. The results show that different species from the same islands cluster together, independent of the ecomorphs, suggesting that the ecomorphs are examples of convergent evolution. I’m sure Anole Annals readers are well-versed in this, but we tried to make the research accessible to high school teachers and students. Teachers are always looking for evolution resources that use actual DNA sequences.

Anole trading cards, used in the classroom exercises.

Anolis allisoni, close relative of our friendly neighborhood A. carolinensis, is a remarkable lizard. It’s also no stranger to Anole Annals, and the populations found off the coast of Honduras were just featured here. We saw a lot of these lizards in Cuba, and the post is pretty picture heavy, so join us after the jump for blue-headed lizards.

Read More

…can mean only one thing: Anolis allisoni. I’ve been trawling through twitter today. Searching on “anole” is no longer useful–the term’s been hijacked by very exuberant tweeters talking about the comic book character’s latest sexploits, but a search on “Anolis” still yields dividends. Including a nice article, in Spanish, on A. allisoni from the Cayos Cochinos off the coast of Honduras (discussed previously on AA). Included are some nice photos, like the one above, and several videos.

Or should I say, festive anole? I’ve come to realize that the Anolis sagrei re-branding scheme is taking off. In any case, Janson Jones has a nice, short festive anole story on today’s issue of Dust Tracks on the Web. Head over there to check it out.

We’re back in the Bahamas for our yearly trip monitoring evolution of brown anoles on small islands (most recently reported on a year ago).  These populations were hammered by Hurricanes Irene and Sandy in 2011 and 2012, and are just now recovering. Most exciting to us was one population reduced to two individuals, which seemed to disappear during the course of our visit last year. Had the population gone extinct? No–we’ve found 14 lizards there this far. Hooray.

Part of what we do is capture lizards, bring them back to the field lab, and x-ray them to measure their morphology, to see how morphology changes from one year to the next. And while doing so, we see all kinds of interesting anomalies. For example, check out the left hind leg of this female–she’s missing most of the toes on that foot. Turns out that that lizards lacking the full complement of digits is not very unusual (check out this post from several years ago on more severe mutilations).

But this year we’ve had some more unusual sightings. Check out the left knee of the male below. Clearly, he broke his femur and it grew back oddly. Yet, it works–this guy was fat and sassy. It would seem amazing that a lizard could break its femur and survive, but here’s the proof.

And check out the tail on this guy. Looks wacky, right?

The x-ray, however, doesn’t do it justice. It’s not only wickedly bent to the side, but also upwards!

Photo by Manuel Leal

Who knows what we’ll find tomorrow?

Club LizKids appears to be the new healthcare.gov…

Many of you visited my lab’s website for kids – lizardsandfriends.org – in the past few days, and a good number of you signed up your children to be a member of our Club LizKids email list.  Thanks so much for your interest!  We hope you and your kids will find this to be a fun group.

BUT, in my recent communication with some of you, I’ve learned that only some of the Club LizKids notifications were coming through to me, even though you received a message confirming your submission.  My web developer (the amazing Tara Whittle) jumped right on that, and we’ve now fixed the problem.  So, if you tried to register for LizKids earlier, please do so again!  

Anolis limon on top, and the closely related A. chocorum (middle) and A. ibanezi (bottom).

The parade of new anoles continues, and this one is beautiful! Velasco and Hurtado- Gómez, in a new paper in Zootaxa, describe a new species of green anole from northwestern Colombia, Anolis limon. The species is closely related to other green lovelies, but differs in dewlap color and a few other characteristics.

As we have chronicled in these pages, the number of anole species continues to rise, up to 388 according to these authors. More importantly, Colombia—lucky place—is the global leader in anoles, with 75 species.

Here’s the etymology of the name: “The specific name limon makes reference to the resemblance of the body color of the females to the green color of the fruits of the lemon tree (Citrus x lemon).”

And the figure below reveals the distribution of the new species and others.

I’ve been re-watching some of my Sitana videos from 2012, and was reminded of an odd interaction between an Indian robin and a male fan-throated lizard (Sitana ponticeriana), from a population in Kutch, Gujarat, in western India. Usually, Indian robins and fan-throated lizards don’t pay much attention to each other. Here’s a video in which a lizard displays when a pair of robins pass by. His dewlap remains extended for a while, which is uncharacteristic, but the interaction doesn’t escalate:

But in the same population, an Indian robin chases after a male fan-throated lizard, after the lizard first ran in the direction of the robin. He starts perched on the rock in the centre of the screen. Here’s a video, slowed down to half-speed. When filming,  I had no idea what was happening, or even where the lizard was, which explains why the camera deviates from the lizard for a while (apologies). 

I’m not sure what’s going on. I didn’t think robins eat lizards–do they? Maybe it thinks the lizard’s tail is a worm? Maybe it’s just playing? Any further ideas?

I don’t think I’ll run into any disagreements by claiming that Anolis vermiculatus is hands-down one of the coolest anoles in existence. First of all, it’s huge – up to 123mm SVL for males. They have blue eyes. They are capable of eating fish and amphibians. They can run across water, and are “truly aquatic” (Schwartz & Henderson 1991). The males in particular seem more like crested water dragons than anoles. A. vermiculatus is sometimes called “lagarto caiman” in Cuba. Although this might bring to mind Dracaena for some, Anolis vermiculatus is quite a different animal. Nevertheless, the name seems appropriate after meeting the creature.

We got our first chance to see A. vermiculatus while staying in Viñales, a lovely, foggy town surrounded by towering limestone mogotes home to Anolis bartschi. We had originally expected to see them only in Soroa, a legendary locality for Anolis in Cuba and a short drive from Viñales. However, we discovered them in abundance along the densely vegetated banks of the mud-brown stream running between our hotel and the road.

A blue eyed Anolis vermiculatus

I generally found A. vermiculatus to be the hardest lizard to get a decent picture of that we encountered (with nods to A. equestris and A. vanidicus). Their preferred habitat is full of shade, and A. vermiculatus is quick to retreat there, often spotting clumsy humans from long distance. If molested further, they leap into the water and apparently remain submerged for some time.

The next day, we were scheduled to have an hour in Soroa, but a bus breakdown allowed us two entire hours. We found more A. vermiculatus, a bit more light, and much clearer water, but the lizards remained a wary bunch. Below are females and a juvenile rafting in what looks like a coconut husk. Sexual dimorphism in this species is significant for size (123mm max SVL for males, 83mm for females, Schwartz & Henderson 1991), and coloration.

I did get the chance to photograph two large males. This individual appears to have some sort of parasite (notice the swelling on the side of the neck). Anyone have any ideas what it could be? My guess would be a nematode. I’m unsure if the deformity of the jaw is another of these parasites or perhaps a different injury.

Although A. vermiculatus is able to run across the surface of water, we did not observe this behavior in our short time with the species. However, it was quite surprising to learn that these lizards do this without the assistance of toe fringes as in Basiliscus.

Here’s the best shot of the bunch:

Next up: a blue lizard that wears yellow pants!