Female Yellow-headed Gecko

June 19th, 2011 - 1:21 PM | Filed under Featured Photos | No comments

January 21, 2011 | Finca La Isla, Limon Province, Costa Rica

Compared to the male, this female Gonatodes albigularis is quite drab.

She looks as if she has suffered some unfortunate incident. Not only does she appear to be regrowing the tip of her tail, but one of her hind feet seems a bit mangled.

Yellow-headed Gecko

May 3rd, 2011 - 6:53 PM | Filed under Featured Photos | 1 Comment

January 19, 2011 | Armonia Nature Preserve, Limon Province, Costa Rica

This species, Gonatodes albigularis, can usually be found on surfaces two to three meters above the ground. Not surprisingly then, I spotted this male just above eye-level on the side of a tree, shortly after dark.

Male coloration as shown here is distinctive among Costa Rican lizards. Interestingly though, coloration changes after dark. The head darkens a bit and the body lightens somewhat. Both still remain distinct from each other. What you see above then is the night color phase, or perhaps a transitional phase between the two. Males also have that white-tipped tail.

As the round pupils suggest, this is a diurnal lizard.

I didn’t measure this one, but they generally grow to around 9cm.

Reference:

A Guide to Amphibians and Reptiles of Costa Rica
by Twan Leenders