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See Houston Zoo Amphibians

Just like all of the amazing animals residing at the Houston Zoo, amphibians on exhibit here serve as ambassadors for their wild counterparts. By visiting and observing these animals in our Reptile House you have the opportunity to appreciate these fascinating and colorful animals up close and personal and thereby feel naturally more compelled to protect them in the wild.

The Reptile and Amphibian House at the Houston Zoo is home to about 100 individual amphibians of 25 species in 15 exhibits. The species range from the tiny Amazon Poison Frog (Dendrobates ventrimaculatus) that is barely larger than a thumbnail, to the Giant Waxy Money Treefrog (Phyllomedusa bicolor) that can reach six or seven inches long. All three amphibian orders are represented and a diverse group of families are also displayed. Considerable attention is placed on displaying various amphibian reproductive modes.

In this section we will regulary showcase amphibians calling the Houston Zoo home.
 

Solomon Island Eyelash Frog (Ceratobrachus guetheri)

The Solomon island eyelash frog is a moderately robust frog that hails from the Bougainville and Solomon Islands in the south Pacific. The species inhabits the forest floor and with its triangular head and “eyelashes” it is thought that they perhaps mimic leaves and rely upon camouflage to avoid predators and wait for prey. Eyelash frogs breed by direct development which means they lay eggs that have no tadpole stage. Instead, they larval amphibians completely undergo metamorphosis within the egg and hatch as tiny versions of the adults. Researches say that this frog is able to tolerate a wide range of different habitats, even popping up in people’s gardens. Likely as a consequence, it is fairly abundant throughout its range. We obtained the animals that are on display from the Omaha’s Henry Doorly Zoo in Nebraska, where they were bred and hatched.

 

Poison frogs

We have four species of Poison frog (Genus Dendrobates) on exhibit at the Houston Zoo. In one tank that is themed around the amphibians of Panama, you can find two color varieties of the Green and Black Poison frog (Dendrobates auratus), one is blue the other is green, however, they are the same species. In another tank that is themed around South America, you can find three color variants of the Dyeing Poison Frog (Dendrobates tinctorius). One has a blue reticulated pattern on its legs, the other has bold yellow markings on its back, and the last one is predominately blue. This cage is also home to the Terrible Poison Frog (Phyllobates terribilis), these frogs are one of the most toxic vertebrates on earth. The last species is the Amazon Poison Frog (Dendrobates ventrimaculatus), these frogs are known as thumbnail frogs because they are only the size of your thumbnail. They hang out in the bromeliads in the exhibit and are bright yellow. All these frogs are toxic to some degree in the wild due to their diet, but in captivity where they eat crickets and fruit flies, they are not toxic
 
Photo courtesy of Bill Konstant

Shancheng Stout Salamanders
Pachyhynobius shanghengensis

The Shancheng Stout Salamanders (Pachyhynobius shangchengensis) have been at the zoo since early 2007. We have two males and two females on exhibit. Males can be differentiated from females by their broad heads. The head of the female is not as wide. There are only two zoo’s in the United States that exhibit this species and only five individuals, Houston has four out of five. This species is a member of a family of Asian salamanders called the Hynobiidae, and are largely unrepresented in the zoo’s of the US. Hynobids are one of only two families of salamander that are external fertilizers. They lay a string or coil of eggs that are concealed inside a curling tube. These salamanders like it cold, we keep them at about 60 degrees Fahrenheit and in the wild they can be exposed to temperatures much lower. In captivity we feed them a diet of earthworms.

 Photo courtesy of Camille Nims Lamoureux, copywrited

Panamanian Golden Frog
Atelopus zeteki

The Panamanian Golden frog (Atelopus zeteki) has been on exhibit in the Houston Zoo’s Reptile and Amphibian House since 2002. Currently, five males are on display in a mixed species exhibit with other Panamanian amphibians. We have four males and eight females in reserve.

This species has been bred several times at the Zoo in an off-exhibit enclosure. The frogs lay their white, unpigmented eggs underwater in between rocks. The tadpoles hatch after a few days and then after another few days develop color. The tadpoles eat brown algae in streams in the wild and in captivity we simulate their diet by making a paste from dried algae powder and water. This paste is applied to a rock or Petri dish, dried for a day and then placed in the tank for tadpoles to consume. They take between four and six months (depending on water temperature) to complete metamorphosis.

Young Panamanian Golden frogs are not gold, they are back and green. The gold color comes as the frog grows. As they grow they switch from smaller food items such as springtails to larger live insect prey like crickets and fruit flies.
 
Future plans for Panamanian Golden frogs at the zoo include swapping out individuals with other institutions to pair up unrelated frogs for breeding purposes as part of the AZA population management plan.
 
Photo courtesy of Rachel Rommel
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