Are Green Anole Known to Behave Aggressively Towards Others in their Tank?

Are Green Anole Known to Behave Aggressively Towards Others in their Tank?

by M
(Midwest US)

Asking for another person.. 2 small green Anoles in terrarium tank. One got aggressive. Did not allow 2nd to eat. 2nd either died or was killed by 1st anole. Both were purchased together. Asking about possible causes for behavior.

Editor Thoughts on Anole Aggression

Hi M!

I'm so sorry to hear about the issues with your green anoles. From your description, it sounds like the aggressive behavior of the first anole led to the unfortunate death of the second. Here are some possible reasons and what can be done to ensure a healthier environment for your remaining anole.

Possible Causes for Aggressive Behavior

1. Territorial Aggression:

Anoles can be territorial, especially males. If both anoles were males, one might have asserted dominance, preventing the other from accessing food and space.


Moving forward, keep only one male anole per terrarium to avoid territorial disputes. If you want to keep multiple anoles, ensure they have ample space and hiding spots to minimize direct confrontation.

2. Lack of Space:

If the terrarium is too small, it can increase stress and competition for resources.


Ensure your terrarium is at least 10 gallons for one anole and larger if you plan to house more. Provide plenty of climbing branches, plants, and hiding places to create a more natural and spacious environment.

3. Insufficient Resources:

Limited access to food and basking spots can cause competition and aggression.


Make sure there are multiple feeding stations and basking spots.
This helps reduce competition and allows each anole to thrive without conflict.

4. Stress Factors:

Environmental stressors, such as poor lighting, incorrect temperature, or high foot traffic near the terrarium, can cause aggression.


Maintain proper UVB lighting and a temperature gradient (75-85°F during the day and a drop at night). Keep the terrarium in a quiet, low-traffic area to reduce stress.

Suggested Course of Action for the Remaining Anole

Health Check:

Observe the remaining anole for any signs of stress or injury. Ensure it is eating well and appears active. If you notice any health concerns, consult a veterinarian specializing in reptiles.
Terrarium Maintenance:


Clean and disinfect the terrarium to remove any potential pathogens. Ensure all equipment, such as heaters and lights, is functioning correctly to provide a stable environment.

Future Housing:

If you decide to get another anole, consider getting a female to avoid territorial disputes. Introduce new anoles cautiously and monitor their behavior closely to ensure compatibility.

It's always tough to lose a pet, especially in such circumstances. By understanding the causes and making necessary adjustments, you can create a safer environment for your remaining anole.

If you have any further questions or need more detailed advice, don't hesitate to reach out. We are here to help!

Editor and Publisher
Cool Small Pets

Please note: This information is intended to complement, not replace, the advice of your pet's veterinarian. Always consult a vet for professional medical advice about your pet's health.

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