Emerald Tree Monitor Care and Housing Guide

Emerald tree monitors require a spacious enclosure that's at least 2x3x4 feet in size, with a temperature range of 75-90°F and humidity levels around 60-80%. They love to climb, so vertical space is a must.

These lizards are native to the rainforests of Indonesia and Papua New Guinea, where they inhabit areas with dense foliage and abundant food sources. In the wild, they spend most of their time basking in the sun or foraging for insects and fruits.

To replicate their natural environment, you'll need to provide plenty of branches, leaves, and plants for your emerald tree monitor to climb on and hide in. A substrate like reptile carpet or paper towels is also a good idea, as it's easy to clean and can help prevent bacterial and fungal growth.

A heat source, such as a heat lamp or ceramic heat emitter, is essential for maintaining the desired temperature range. A UVB light will also be necessary to provide the necessary UVB rays for calcium metabolism and preventing metabolic bone disease.

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The emerald tree monitor's taxonomy is a fascinating topic. Varanus prasinus was first described as Monitor viridis by John Edward Gray in 1831, but the original holotype was lost and later redescribed by Schlegel as V. prasinus.

The generic name Varanus comes from the Arabic word waral, which translates to English as "monitor", and its specific name, prasinus, is Latin for the color green. This species is a member of the subgenus Hapturosaurus and is closely related to several other arboreal species.

Varanus prasinus is part of a larger group of species that are all found east of Lydekker's line in the Indo-Australian Archipelago. The V. prasinus group probably originated in the Moluccas, but dating their origins is complicated by the lack of fossil records.

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Taxonomy can be a complex and ever-evolving field, but let's break it down with the example of the Varanus prasinus, also known as the green monitor.

The Varanus prasinus was first described by John Edward Gray in 1831 as Monitor viridis, but the original holotype was later lost.

Its generic name, Varanus, comes from the Arabic word waral, which translates to English as "monitor". This is a fascinating example of how language and culture can shape our understanding of the natural world.

The species' specific name, prasinus, is Latin for the color green, which is a fitting description given its vibrant hue.

Varanus prasinus is a member of the subgenus Hapturosaurus, which is a group of arboreal species that are closely related to one another.

However, recent research has suggested that V. prasinus may be paraphyletic, meaning it may actually be composed of multiple species.

This is an important consideration in taxonomy, as it can have significant implications for our understanding of the evolutionary relationships between different species.

The subgenus Hapturosaurus includes several other species, including V. beccarii, V. boehmei, and V. bogerti, among others.

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The evolutionary history of monitor lizards is a fascinating topic. The family Varanidae probably originated in Asia about 65 million years ago.

These ancient lizards have been on our planet for a long time, with some estimates suggesting they emerged as early as the late Mesozoic era, around 112 million years ago.

Monitor lizards likely migrated to Australia and the Indonesian archipelago between 39 and 26 million years ago. This event marked the beginning of their spread across the Indo-Australian Archipelago.

The V. prasinus species group, also known as subgenus Euprepiosaurus, is found east of Lydekker’s line in the Indo-Australian Archipelago. This group probably originated in the Moluccas.

Here are some key milestones in the evolutionary history of monitor lizards:

The absence of large placental predatory mammals east of Wallace's line may have contributed to the radiation of the V. prasinus group in the Australo-Papuan region.

The emerald tree monitor is a remarkable creature, with a slender body that helps it support itself on narrow branches. It's about 75-100 cm (30-39 in) long, which is quite impressive.

Its prehensile tail and long claws are perfect for gripping branches, allowing it to climb with ease. The soles of its feet have enlarged scales that aid in climbing, making it a skilled arboreal lizard.

Despite its impressive climbing abilities, the emerald tree monitor has also been known to swim and forage for food under shallow water.

The emerald tree monitor is about 75–100 cm (30–39 in) long, making it a relatively long species of lizard.

Its slender body is perfectly suited for life in the trees, allowing it to support itself on narrow branches with ease.

This monitor uses its prehensile tail and long claws to grip branches, giving it a secure hold on its surroundings.

Unlike other varanids, the emerald tree monitor defends its tail rather than lashing with it for defense when threatened.

The soles of the feet of the emerald tree monitor have enlarged scales, which aid the lizard when climbing.

Despite its lack of aquatic adaptations, the emerald tree monitor has been known to swim and forage for food under shallow water.

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For a happy and healthy green tree monitor, temperature is key. The ideal basking area temperature is between 100-120°F, which can be measured with a temperature gun.

To achieve this, you'll want to place a cluster of halogen heat bulbs above the basking branch, making sure they cover an area at least as large as the lizard's body. This will ensure even heating.

Temperatures can fluctuate, so it's essential to have a thermometer to monitor the temperature. In fact, we recommend using at least two digital probe thermometers to ensure accuracy.

At night, the temperature can drop to as low as 70-73°F, which is perfectly normal.

The emerald tree monitor can be found in the wild on the island of New Guinea, which is shared by Indonesia and Papua New Guinea, as well as several adjacent islands and the northern Torres Strait Islands.

These lizards thrive in lowland environments, including tropical evergreen forests, palm swamps, and even cocoa plantations.

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The green tree monitor is found in the wild on the island of New Guinea, which is shared by Indonesia and Papua New Guinea. It's also been spotted on several adjacent islands, including the northern Torres Strait Islands.

These monitor lizards thrive in lowland environments, which include tropical evergreen forests, palm swamps, and even cocoa plantations.

You can find information about the green tree monitor's conservation status on the IUCN Red List, where it's classified as a least concern species.

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Green tree monitors are a tropical species, so they require a humid environment to thrive. The ideal humidity level for their enclosure is around 75% on average and up to 100%.

You can measure the humidity level using a digital probe hygrometer, which should be placed in the middle of the terrarium. To increase the humidity, you can mist the enclosure with a large pressure sprayer or an automatic misting system.

This method not only helps maintain the right humidity level but also allows your monitor to drink water by misting the leaves in the enclosure. Be sure to mist the enclosure well enough to provide droplets and small pools on leaves, but avoid oversaturating the environment.

A cool mist humidifier can also be installed to help maintain the humidity level if needed. Providing a large water bowl is also a good idea, even though you may never see your monitor use it.

The emerald tree monitor's social nature is quite unique. It lives in small groups made up of a dominant male, several females, and a few other males and juveniles.

These groups are a fascinating aspect of the emerald tree monitor's behavior. They're one of the few social monitor species.

If threatened, the emerald tree monitor will flee through vegetation, trying to escape the danger.

The female emerald tree monitor lays her eggs in arboreal termite nests, which provide ideal conditions for incubation.

Eggs typically weigh 10.5-11.5 grams and measure about 2 by 4.5 cm.

The female emerald tree monitor can lay up to three clutches throughout the year, with clutches laid in January, March, April, November, and December.

The eggs hatch between 160 and 190 days later, typically from June to November.

After hatching, the young eat the termites and the termite's eggs within minutes.

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Emerald tree monitors are protected under Indonesian law, which helps safeguard their populations in the wild. They're also found in protected reserves within their native range.

Their adaptability is a plus, as they can thrive in modified habitats like plantations as long as some trees and prey items are available. This flexibility makes them more resilient to changes in their environment.

The pet trade is a well-managed industry for emerald tree monitors, with captive breeding programs in place to ensure their well-being. However, it's essential to be mindful of the pet trade and its potential impact on wild populations.

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Here are some ways to support the conservation of emerald tree monitors:

Emerald tree monitors are protected under Indonesian law, which provides a safe haven for this species. They can thrive in protected reserves within their native range.

Their adaptability is a testament to their resilience, allowing them to survive on plantations or in modified habitats as long as some trees and prey items are available.

There are no significant threats to their survival in the wild, a fact that's reassuring for their future.

Green tree monitors need UVB lighting for best health. This type of lighting provides a clear day/night cycle and all the vitamin D your pet needs.

UVB lighting also strengthens the immune system and facilitates better digestion. In fact, it offers several benefits that are essential for your pet's well-being.

To give your green tree monitor the best UVB lighting, you'll want to use a specific type of bulb. For example, the Arcadia Desert 6% and Zoo Med Reptisun T5 HO 5.0 are excellent options.

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If you're not sure how far to place the bulb, here are some guidelines: place the bulb 6-10 inches away from the highest branch.

A common lighting schedule for green tree monitors is 12 hours on and 12 hours off. However, you can also adjust the schedule to mimic the actual sun, with longer times on during the summer and shorter times on in the winter.

When choosing a substrate for your green tree monitor, it's essential to select a naturalistic option that will help maintain humidity and provide a comfortable environment for your pet.

We recommend using a substrate that's at least 4” deep to give your lizard enough room to dig and move around.

One of the best things about using a naturalistic substrate is that it can help cushion your lizard against falls, making the enclosure a safer space for your pet.

Some recommended substrates for green tree monitors include Zoo Med Eco Earth, Zoo Med ReptiSoil, Exo Terra Plantation Soil, Zilla Jungle Mix, and a homemade soil/sand mixture.

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Layering clean, chemical-free leaf litter on top of the substrate can also help with humidity and add enrichment value to the enclosure.

Here are some recommended substrates for green tree monitors:

It's also important to replace the substrate completely every 3-4 months, along with removing any poop and urates daily, to keep the enclosure clean and healthy for your pet.

An empty enclosure makes for a bored lizard, reducing its quality of life. You want to make sure all branches are securely anchored into the walls/floor of the enclosure to prevent collapse and accidental falls.

Green tree monitors are arboreal, so at bare minimum you'll need large, sturdy branches for them to bask and climb on.

To keep your pet entertained and engaged with its environment, include other items such as hideouts/caves, more branches, ledges, and live or artificial foliage and plants.

Here are some essential items to include in your green tree monitor's enclosure:

If you're looking to provide your emerald tree monitor with the best possible nutrition, you'll want to consider adding supplements to their diet.

Calcium supplements are a must-have for green tree monitors, and you can choose from a variety of options.

Zoo Med Repti Calcium Without D3, Rep-Cal Calcium Without D3, Repashy NoD, and Arcadia EarthPro Calcium Pro Mg are all good choices.

A multivitamin is also a great idea, especially on days when you don't want to dust their foods with calcium.

Repashy Calcium Plus LoD, Arcadia EarthPro RevitaliseD3, and Zoo Med ReptiVite With D3 are all good options to consider.

You can dust their foods lightly with calcium supplements every day, but reserve the multivitamin for 1-2 days per week.

Handling your emerald tree monitor with care is crucial to building a trusting relationship. They can get stressed easily with over handling, so it's essential to start with positive interactions.

Offering food from feeding tweezers or your hand is a great way to begin. This can help your lizard associate you with a positive experience.

Grabbing your emerald tree monitor from above can be intimidating for them, so it's best to scoop from below. This will help them feel more secure.

Supporting as much of their body as possible when handling is also important. This can help prevent them from feeling like they're falling or losing their balance.

Start with short handling sessions at first, then gradually make them longer. This will allow your lizard to get used to being handled and reduce stress.

Put your emerald tree monitor back in its enclosure only when it's calm. This will help prevent any further stress or anxiety.

Here are some key handling tips to keep in mind: