Parasitism by ticks and moths in snakes
Parasitism by ticks and moths is a common external infestation in snakes, including the Montpellier snake. \n\nThese small parasites cling to the snake's skin, especially around the eyes, nostrils, under the scales and near the cloaca. \n\n...
What is it?
Parasitism by ticks and moths is a common external infestation in snakes, including the Montpellier snake. \n\nThese small parasites cling to the snake's skin, especially around the eyes, nostrils, under the scales and near the cloaca. \n\nIn wild animals like the Montpellier snake, this parasitism generally remains discreet and well tolerated, but in a captive or weakened animal, the infestation can become massive and pose a real health problem.
Commonly observed signs
These signs are neither exhaustive nor specific. Only a veterinarian can establish a diagnosis.
Related signs — each one links to its page:
Small moving black, gray or reddish dots are often seen on the skin, particularly around the eyes, in the folds of the scales or near the head. \n\nThe snake may rub itself against objects in its environment to try to get rid of parasites, which sometimes causes small sores or scabs. \n\nIn the event of a significant infestation, we may notice depression, loss of appetite, skin that appears irritated or dull, and sometimes paleness of the mucous membranes linked to repeated blood loss caused by the parasites. \n\nA bad moult, incomplete or in tatters, is also a suggestive sign.
When to consult without delay
This list does not replace veterinary advice. It gathers situations that justify a prompt consultation.
Causes and risk factors
The infestation is caused by ticks (such as certain species of the genus Ixodidae) or snake mites (notably Ophionyssus natricis), tiny mites that feed on the reptile's blood. \n\nThese parasites attach themselves to the skin and can multiply rapidly if conditions are favorable, particularly in a humid, warm environment such as a poorly maintained terrarium.
A captivity environment with insufficient hygiene encourages the multiplication of moths. \n\nContact with other infested reptiles, the introduction of a new animal without quarantine, or a natural habitat rich in ticks increase the risk. \n\nA weakened, stressed or already sick animal is more susceptible to a severe infestation.
Diagnosis and care
Diagnosis is the veterinarian's responsibility, based on clinical examination and laboratory tests. Care is decided case by case.
The reptile veterinarian carefully examines the skin, scales, eyes and fold areas for parasites, sometimes using a magnifying glass. \n\nAn additional examination may be offered if the infestation seems severe, in order to check the general condition of the animal, in particular the presence of anemia linked to repeated blood loss.
Treatment
Treatment is based on external antiparasitics adapted to reptiles, applied or administered only under veterinary supervision due to the particular sensitivity of these animals to certain molecules. \n\nThorough and repeated cleaning of the environment is essential alongside treatment of the animal, as moths can survive in the terrarium apart from their host. \n\nIn severe cases with anemia, general support may be necessary.
Treatment depends on the cause and the animal's condition: it must be determined by a veterinarian. No self-medication.
Prevention
Good hygiene of the terrarium, regular and complete cleaning of the substrate, accessories and surfaces greatly limit the risk of infestation. \n\nAny new snake introduced into a farm should be quarantined and inspected before any contact with other animals. \n\nIn nature, there is no specific prevention, light infestation by ticks being part of the normal ecology of the species.
Possible complications
A massive, untreated infestation can cause significant anemia through chronic blood loss. \n\nParasites can also promote secondary infections of the skin in irritated or injured areas, and seriously disrupt the shedding process.
When to see a veterinarian
Presence of numerous mobile black or gray dots on the snake's skin.
Repeated rubbing against the walls of the terrarium or the floor.
Incomplete, ragged, or abnormally frequent shedding.
Dejection, loss of appetite or pale mucous membranes associated with visible parasites.
Prognosis
The prognosis is generally good when the infestation is detected early and treated correctly, with complete disappearance of the parasites after appropriate treatment and environmental sanitation. \n\nIn severe cases with marked anemia, the prognosis becomes more guarded and requires close veterinary care.
Frequently asked questions
Are snake moths dangerous to humans?
No, snake mites like Ophionyssus natricis are specific to reptiles and do not parasitize humans, although they can occasionally cause temporary irritation on contact.
Is a wild Montpellier snake with ticks sick?
Not necessarily. Small numbers of ticks are often well tolerated by a healthy wild snake and do not warrant routine intervention.
How to spot moths in a terrarium?
Tiny dark spots can sometimes be seen moving on walls, in waterholes, or near the snake's resting areas, especially at night.
Should we isolate an infested snake from other reptiles?
Yes, it is recommended to isolate the infested animal and also treat its environment to prevent spread to other reptiles in the same living space.
References
ESCCAP — European Scientific Counsel Companion Animal Parasites
AVMA — American Veterinary Medical Association
Content reviewed by the TunisieVet editorial team · Updated 30 August 2026
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