That Reptile Blog – Reptile, Amphibian and Exotic Pet Care and Information

Many interesting, current amphibian and reptile field research reports are published in professional journals such as Copeia, Herpetologica and Herpetological Review, and are not available on the internet.  Unfortunately, such journals are usually quite expensive (if well-worth the price).  From time to time I’ll provide summaries of some of the fascinating articles that I come across.  Today’s report covers Spring, 2020 publications: Clouded Salamanders, Red-Eyed Treefrogs, Green Frogs and Strawberry Poison Frogs.

Clouded Salamander, Aneides ferrus

Although known to climb trees, the Clouded Salamander is most often found (and studied) below fallen logs.  Researchers in southwestern Oregon were, therefore, surprised to find a pair of these salamanders in a tree cavity (Douglas Fir) 240 feet above the ground.  Red Tree Voles (small arboreal rodents) were also using the site for food storage.

It is not known if water contained within tree cavities might provide a breeding site for Clouded Salamanders.

Red-Eyed Treefrog, Agalychnis callidryas

Researchers in Costa Rica reported the first known example of a spider feeding upon amphibian eggs.  A Rusty Wandering Spider (Cupiennius getazi) was photographed while consuming Red-Eyed Treefrog eggs, which had been deposited on a leaf overhanging a small pond.  Interestingly, the spider appeared to defend its food source.

The eggs did not spontaneously hatch when disturbed by the spider, as they do when attacked by wasps and snakes.

Strawberry Poison Frog, Oophaga pumilio

Although diurnal activity is the rule for Dendrobatids (Poison Frogs), male Strawberry Poison Frogs were observed calling and engaging in territorial battles after dark (Costa Rica)…perhaps its time to install night-viewing lights on our Poison Frog terrariums!

Green Frog, Rana clamitans

Long known for occasionally producing blue-colored Green Frogs, a stream in upstate NY has now yielded a brilliant yellow specimen.  The frog also sported a black blotch on its back, green above the eyes, and greenish-brown legs – quite a sight!

Further Reading

A video of a treefrog eggs hatching while being attacked by a snake, along with fascinating info and photos, is posted on the Warkentin Lab website.

A recent announcement by the US Fish & Wildlife Service (US F&WS) has fueled rumors that the shipping of frog legs (please see photo) and the pet trade in live frogs and salamanders may soon be curtailed or banned.  This is not actually the case, but there will soon be an opportunity for people to register comments concerning the trade with the US government. Read More »

Please see Parts 1 and 2 of this article to read about the natural history of the Green Frog (Lithobates/Rana clamitans) and some personal observations on its behavior.

An Agreeable Personality

Green Frogs make wonderful pets…even wild-caught adults settle down and hand-feed in short order (please see video below). This is in sharp contrast to many US natives, such as American Bullfrogs, Leopard Frogs and Pickerel Frogs, which often remain high-strung and difficult to observe, even after years in captivity. In “personality”, the amiable Green Frog is closer to the unflappable American Toad than to its nearer relatives. Read More »

Herpetologists at Panama’s Smithsonian Tropical Research Institute have uncovered a here-to-fore unknown form of communication among frogs. Using robotic frogs, infra-red lights and accelerometers, they have established that male Red-Eyed Treefrogs (Agalychnis callidryas) compete by shaking their bodies, which in turn vibrates the plant stems upon which they are perched.

Vibration Contests

Writing in the May 20, 2010 edition of Current Biology, researchers speculate that the vibrations sent through plant stems enable other male frogs can access the plant shaker’s intent, size and status. It appears that the frogs’ vocal calls may also vibrate plants, but further research is needed.

Additional studies are also being planned to determine if other herps, birds or mammals utilize vibration-based communication (invertebrates are known to do so). Read More »

Most of the comments/questions I receive concerning Dwarf African Clawed Frog (Hymenochirus boettgeri or H. Curtipes) care go something like this: “My Frog Won’t Eat”! or “My Fishes Steal the Frog’s Food”!  This has been the case for, quite literally, decades.  Despite the fact that these charming little frogs are very popular in the pet trade, there remains a great deal of mystery surrounding their care – and this very often it leads to their early demise.

The Problem

Dwarf Clawed Frogs are often confused with young African Clawed Frogs (Xenopus laevis), but their dietary needs differ radically from those of their larger cousin (the two species are easy to tell apart, please see article below).  Read More »