The Monitor Lizard Diet: What do Monitor Lizards Eat?

The Monitor Lizard Diet: What do Monitor Lizards Eat?

Keeping a monitor lizard as a pet or simply observing them in the wild can be an intriguing experience. These reptiles have unique dietary requirements that contribute to their overall health and well-being. In this article, we will explore the intricacies of the monitor lizard diet, including their preferred foods, essential nutrients, foods to avoid, and guidelines for feeding these fascinating creatures.

Monitor Lizard Diet Basics

  • Insect to Plant Food Ratio: Monitor lizards typically have a varied diet consisting of both live prey and plant-based foods. As hatchlings and young lizards, they primarily rely on insects for nutrition. However, as they grow older, the ratio shifts towards a greater consumption of plant matter.
  • Feeding Frequency by Age: The frequency of feeding varies depending on the age of the monitor lizard. Younger lizards require more frequent meals, while adult lizards can be fed less frequently.

Essential Foods for Monitor Lizard Diet

Essential Foods for Monitor Lizard Diet
Essential Foods for Monitor Lizard Diet

Preferred Live Food Options

  • Crickets: Crickets are a staple in the diet of monitor lizards. They provide a good source of protein and are readily available in most pet stores.
  • Mealworms: Another popular option, mealworms are rich in fat and protein, making them a nutritious choice for monitor lizards.
  • Roaches: Certain species of roaches, such as Dubia roaches, serve as excellent live food options due to their nutritional value.
  • Silkworms: Silkworms are high in calcium, making them a suitable addition to a monitor lizard’s diet.
  • Waxworms: Although high in fat, waxworms can be offered occasionally as a treat or to entice picky eaters.

Safe Vegetables for Regular Intake

  • Collard Greens: Rich in calcium, collard greens are an excellent leafy green vegetable for monitor lizards.
  • Mustard Greens: Similar to collard greens, mustard greens are a nutritious choice that can be included in their regular diet.
  • Kale: High in antioxidants and fiber, kale provides a range of health benefits for monitor lizards.
  • Squash: Monitor lizards may enjoy various types of squash, such as butternut squash or acorn squash, which offer vitamins and minerals.
  • Bell Peppers: Bell peppers provide essential vitamins and add variety to the monitor lizard’s diet.

Recommended Fruits for Monitor Lizard Diet

  • Papaya: Rich in vitamins A and C, papaya is a delicious fruit that can be a part of a monitor lizard’s balanced diet.
  • Blueberries: These small berries are packed with antioxidants and can be offered as a tasty treat.
  • Bananas: An easily digestible fruit, bananas are a good source of potassium.
  • Watermelon: With its high water content, watermelon serves as a hydrating snack for monitor lizards.
  • Mango: Another fruit rich in vitamins A and C, mangoes can be fed to monitor lizards in moderation.

Essential Vitamins & Minerals

Certain vitamins and minerals play a vital role in a monitor lizard’s diet and overall health. Here are a few examples:

  • Calcium: Adequate calcium intake is crucial for maintaining healthy bones and preventing metabolic bone disease. Calcium supplements or calcium-rich foods should be provided regularly.
  • Vitamin D3: Monitor lizards require UVB lighting to synthesize vitamin D3, which aids in calcium absorption and prevents deficiencies.
  • Vitamin A: This vitamin supports skin health, vision, and immune function. Providing foods rich in vitamin A, such as papaya and carrots, ensures proper nutrition.

Foods to Avoid for Monitor Lizards

While monitor lizards have diverse dietary options, certain foods should be avoided due to potential health risks. These include:

  • Insects with Hard Shells: Monitor lizards may struggle to digest insects like beetles or cockroaches with hard exoskeletons.
  • Toxic Plants: Monitor lizards should not be exposed to plants that are poisonous or have toxic components, such as certain species of lilies, azaleas, or ivy.
  • High-Fat Foods: Although small amounts of fatty foods like waxworms are acceptable as treats, excessive consumption can lead to obesity and other health issues.

Feeding Guidelines for Monitor Lizard Owners

  • Provide a varied diet to ensure a wide range of nutrients.
  • Dust live prey with calcium supplements to enhance the lizard’s calcium intake.
  • Monitor lizards should be offered food items that match their size, avoiding items that are too large to swallow comfortably.
  • Fresh food and water should be available at all times.
  • Monitor feeding behavior and adjust portion sizes accordingly to maintain a healthy weight.
  • Consult a veterinarian specializing in reptiles for specific dietary recommendations tailored to your monitor lizard’s needs.

Understanding Monitor Lizard Hydration Needs

Monitorlizards, like all reptiles, have specific hydration requirements to stay healthy. While they obtain some moisture from their food, it’s important to provide them with access to clean water for drinking and proper hydration.

  • Water Dish: Place a shallow water dish in the enclosure that is large enough for the monitor lizard to soak in. Ensure that the dish is cleaned regularly to prevent bacterial growth.
  • Misting: Monitor lizards may also benefit from regular misting, especially if they are from humid environments. Misting the enclosure with clean water can help increase humidity levels and provide an opportunity for the lizard to drink droplets.
  • Bathing: Occasionally, you can offer your monitor lizard a shallow bath. This not only helps with hydration but also promotes shedding and skin health. Use lukewarm water and supervise the lizard during the bath to ensure its safety.

It’s essential to observe your monitor lizard’s behavior and adjust its hydration routine accordingly. Some individuals may have specific preferences or requirements, so monitoring their drinking habits and overall health is crucial.


Understanding the dietary needs of monitor lizards is essential for their well-being, whether you own one as a pet or encounter them in their natural habitat. The monitor lizard diet consists of a balance between live prey and plant-based foods, with a shift towards more vegetation as they grow older. Providing a variety of suitable live food options, safe vegetables, fruits, and essential nutrients like calcium, vitamin D3, and vitamin A ensures a healthy diet. Avoiding certain foods, maintaining proper hydration, and following feeding guidelines will contribute to the overall health and longevity of these fascinating reptiles. Remember to consult with experts or veterinarians specializing in reptiles for personalized advice and recommendations based on your monitor lizard’s specific needs.

FAQs About Monitor Lizard Diet

Do monitor lizards eat fruits and vegetables?

Monitor lizards are primarily carnivores, but some species incorporate fruits and vegetation into their diet. However, the majority of their diet consists of animal protein due to their carnivorous nature.

Are monitor lizards opportunistic feeders?

Yes, many monitor lizards are opportunistic feeders. They adapt their diet to what’s available in their environment, consuming a variety of prey based on availability and local conditions.

How often do monitor lizards need to eat?

Feeding frequency varies depending on factors like age and species. Younger monitors may eat more frequently, while adults might eat less often. Regular feeding ensures they meet their nutritional needs for growth and maintenance.

Is a varied diet important for monitor lizards?

Absolutely, a varied diet is crucial for monitor lizards. It helps prevent nutritional deficiencies and ensures they receive a balanced intake of proteins, fats, vitamins, and minerals necessary for their overall health.

Can captive monitor lizards be fed insects only?

While insects can be part of their diet, relying solely on insects can lead to nutritional imbalances. A proper captive diet should mimic their natural diet, which includes a mix of prey such as rodents, eggs, and occasionally fruits.

How can monitor lizards get the calcium they need?

Monitor lizards require calcium for proper bone health. Providing calcium-rich food sources and appropriate supplements is essential. Without sufficient calcium intake, they might suffer from metabolic bone diseases that can affect their well-being.

What are the challenges of feeding monitor lizards?

Challenges include sourcing appropriate prey, ensuring nutritional balance, and preventing overfeeding. Meeting their dietary needs can be complex, especially in captivity, requiring knowledge of their natural diet and nutritional requirements.

Can monitor lizards’ diet change as they grow?

Yes, a monitor lizard’s diet can change as they age. Juveniles might focus on smaller prey to accommodate their size, while adults can handle larger prey. Adapting their diet to their growth stages is essential for proper development and health.

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