Ranitomeya variabilis ‘High Land’
Intro
Ranitomeya variabilis “Highland” (pronounced Ran-it-oh-may-ah var-ee-ah-bill-iss (sss like a snake) are yellow, lime, and blue in color.. Being a Ranitomeya frog, Highland are small. These little fellas are quick and can be a bit on the shy side, but may warm up to you if you visit them through the glass a lot. They are diurnal like all Ranitomeya, so you won’t have to get up late to watch them. They should be active when you are! These are easy to care for and make a great dart frog for a novice keeper.
Quick Stats:
Enclosure: 30cmX30cmX45cm (12”X12”X18”)
Heat: 18°C-27°C (65°F-80°F)
Humidity: 70-100%
Food: Juveniles D. melanogaster, Adults may take D. hydei, small isopods, springtails.
Lifespan: Approximately 10+ years
Description
Highland frogs are not too variable in their coloring. Their heads are yellow or lime, and the yellow if present fades into lime on the upper body and continues down to the legs, where the powder blue or blue-grey color starts. Heads, backs, and legs are spotted or blotched in black. This can vary somewhat in each individual frog. Medium-large for a Ranitomeya, big females measure in at about 19mm, and males are typically slightly smaller. Females are often rounder than males. Highland frogs share the common pearlescence of the Ranitomeya genus.
Distribution and Natural Habitat
Variabilis Highland are native to Peru, at higher altitudes but still in the Amazon basin. These frogs prefer to be off the ground and can be found living in bromeliads and leaves in the tropical Rainforest. However, they like to lay their eggs in the leaf litter on the ground or a smooth surface like the leaf of a bromeliad. Variabilis is considered by the IUCN Red List as “Data Deficient”, meaning populations of Highland are unknown. However they are under constant threat from deforestation for agriculture and a deadly virus that is affecting frogs around the world.
Behavior
Like all Ranitomeya, the Highland frogs are diurnal meaning they are awake during the day. They are arboreal and live in the low hanging leaves of the jungles they inhabit. In the wild they are constantly foraging for small insects, invertebrates and arthropods on and around their plants. Some of the plants in the jungles contain various alkaloids and toxins, the micro fauna eat these plants and in turn get eaten by the frogs. This causes a downstream effect and these amazing frogs have evolved to harness the toxins as a means of self-defence. A combination of their striking colors and the toxins stored in their glands help ward off potential predators. In captivity the variabilis do not contain any of these toxins due to the diet provided to them. They don’t have access to the food they would be eating in the wild. Highland live near streams and ponds, or right on the edge of slow moving water. While being frogs they are not very good swimmers and great care should be taken when making a suitable vivarium for them to live in. Once mature, the males will boldly perch in the open and call out to attract females. The variabilis call is soft. It sounds like a short, soft “buzz buzz”. When a female selects a male, the pair will hop away to a nice quiet place, often in a bromeliad, and mate. For most variabilis the adult frogs are not aggressive and a mixed group can be kept. Be aware that this may change with individual frogs.
Life in the Vivarium
Like all dart frogs, Highland requires a humidity range of 70-100%. They can survive for brief intervals at 50% humidity if clean water is provided for them to soak in. You can place a bromeliad or small shallow dish of water in the enclosure or add a pond feature to achieve this. Remember, variabilis Highland cannot swim well, so ensure that the water source is shallow and easy to get out of. The water level should be no higher than the smallest frog can sit in with his head and upper torso out.
Highland thrive at temperatures near 21°C (70°F) but can survive a range of 18°C-27°C (65°F-80°F). Never exceed 29°C (85°F) as this can be fatal to the frogs. Generally a heat source such as a pad or light is not needed on a dart frog vivarium, apart from any lighting for plants. Do not rely on sunshine from a window, because the sun through the glass will heat up to extremely unsafe temperatures very quickly. Keep note of any air conditioning or heaters used in your home as well, as they may affect the temperature in your frog cage.
It is possible to house a couple of variabilis Highland in a 10 gallon aquarium. We recommend a minimum 30cmX30cmX30cm (12”X12”X18”) enclosure – but bigger is always better. This size vivarium is suitable to house 2-3 adult Highland.
As juveniles you can house several Highland together in a larger enclosure, as adults they get along well. In our experience Highland can be housed in male heavy mixed groups, but if any fighting is observed you will be required to remove the offending frog. The size of the vivarium provided and the individual personalities of each animal will dictate how many frogs you can keep in an enclosure. It is common to keep a pair or trio of frogs in one enclosure.
It is common for a healthy Ranitomeya to live for 10+ years in a vivarium. Please consider this before deciding to take them home to your family. As with most amphibians they are considered a “hands off” pet similar to a fish. Due to their delicate and permeable skin, it is not advised to handle your frogs. The chemicals, oils and debris on your hands could prove fatal to your dart frog pet when it is absorbed through their skin. It is recommended that you wear powder free rubber gloves if you are required to handle your dart frogs. In an emergency, such as an escape from the enclosure, try to capture them as fast as possible (bare hands will do… if needed) as they will try to hide quickly, and unfortunately this will become fatal very rapidly.
Variabilis Highland requires small live prey to hunt. This is easily achieved by providing them with flightless or wingless fruit flies. Baby and juvenile Highland will eat Drosophila melanogaster fruit flies, and large adults may seek out Drosophila hydei. Springtails are also a wonderfully sized snack for these thumbnail size frogs. The flies and springtails on their own are a poor nutritional source. We recommend “dusting” your fruit flies with a high quality vitamin and mineral supplement. We use and recommend Dendrocare all in one vitamin/mineral supplement. You can combine and use other supplements available to you, however please ensure you research what ratio or frequency you can supply vitamins as some can be lethal in high dosages.
It is recommended that you build a bioactive vivarium for your dart frogs. This is achieved by introducing isopods and springtails into the environment. These little land crustaceans (no they are not insects!) will eat the decaying and decomposing bio matter as well as any excess feces in the vivarium. Some of these micro fauna will be eaten by your dart frog, as a little snack.
As with all our frogs, we do not recommend that you house multiple species or morphs together. Please supply each group with a vivarium to call their own.
Breeding in Captivity
If you have provided all the necessary parameters to keep your variabilis Highland happy and healthy, they are considered easy to moderate to breed in a vivarium. This makes them a popular choice for many dart frog enthusiasts, but less common with beginners. Eggs will be laid in the leaf litter or in a bromeliad in a secluded location. Many hobbyists will place a film canister, at 35-45 degrees on the wall of the enclosure. No intentional parental care will occur after eggs are laid so it is up to the handler to protect them. Typically 4-7 eggs will be laid at one time. The eggs take approximately 10-14 days to fully develop. The tadpoles will take approximately 60-80 days to fully metamorphosize into colorful little froglets.
Final Notes
Ranitomeya variabilis Highland have a beautiful yellow, green, and blue gradient covered in black spots and stripes. These adorable little dart frogs can be a bit shy but make great beginner frogs. Their beauty also means they’re a must in any established collection.
