Gastrointestinal parasitism in plovers (roundworms)
Gastrointestinal parasitism caused by roundworms (nematodes) is a common condition in plovers, small wading birds that often live in wetlands, lagoons, or mudflats. These parasites live in the bird's stomach or intestines and feed at its e...
What is it?
Gastrointestinal parasitism caused by roundworms (nematodes) is a common condition in plovers, small wading birds that often live in wetlands, lagoons, or mudflats.
These parasites live in the bird's stomach or intestines and feed at its expense. They are mainly a concern for plovers kept in captivity, at rehabilitation centers, or in aviaries, where overcrowding and repeated contact with soiled ground promote their spread.
In the wild, a healthy plover often tolerates a low parasite burden without visible signs. Problems develop when the bird is weakened, young, stressed, or housed in a contaminated environment.
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:
Signs are often subtle at first. Progressive weight loss may be seen despite sometimes preserved appetite, dull and poorly maintained plumage, decreased activity, and lethargy.
Digestive disturbances are common: abnormally soft or loose droppings, sometimes discolored, and abdominal bloating. In young plovers, stunted growth is possible.
With heavy infestations, roundworms may be visible in the droppings. The bird may become dehydrated and severely weakened if left untreated.
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 condition is caused by nematodes (roundworms) that establish themselves in the plover's digestive tract, particularly in the proventriculus (glandular stomach), gizzard, or intestine. Several genera of avian nematodes may be involved depending on the region and the bird's environment.
The bird becomes infected by ingesting eggs or larvae present in water, mud, soil, or through an intermediate host such as aquatic invertebrates that plovers feed on.
Young birds, weakened or injured individuals, and recently rescued birds at rehabilitation centers are more vulnerable.
Overcrowded housing, ground fouled by droppings, poor hygiene of pools or aviaries, and prolonged stress (captivity, transport, co-housing) increase the risk of infestation and parasite multiplication.
Poor or unbalanced nutrition also weakens the bird's natural defenses against parasites.
Diagnosis and care
Diagnosis is the veterinarian's responsibility, based on clinical examination and laboratory tests. Care is decided case by case.
Your veterinarian will typically examine the droppings under a microscope (faecal flotation) to identify and count roundworm eggs. This test confirms the diagnosis and guides the choice of treatment.
A thorough clinical examination of the bird, including assessment of weight and overall condition, completes the evaluation. In some cases, further tests may be recommended if the bird is severely weakened.
Treatment
Treatment relies on giving antiparasitic drugs (wormers) that are effective against roundworms, prescribed and dosed by your veterinarian based on the parasite species identified and the bird's condition.
Nutritional support and rehydration may be needed if the bird is noticeably weakened. Cleaning the bird's environment goes hand in hand with treatment to prevent rapid reinfection.
Treatment depends on the cause and the animal's condition: it must be determined by a veterinarian. No self-medication.
Prevention
Regular cleaning of floors, pools and aviaries significantly reduces the presence of infective eggs and larvae in the environment.
Avoiding overcrowding, isolating new arrivals in quarantine and monitoring droppings allow early detection.
Regular veterinary check-ups with faecal examination for parasites (faecal flotation) are recommended for captive birds or birds in care facilities, to adjust treatment before clinical signs appear.
Possible complications
A heavy untreated infestation can lead to severe malnutrition, dehydration and general weakness that may threaten the bird's survival, especially in young or already vulnerable individuals.
Digestive injury (inflammation, partial blockage) can occur in the most severe cases.
When to see a veterinarian
The bird is noticeably losing weight or its plumage becomes dull.
Soft, liquid or abnormal droppings persist for several days.
Worms are visible in the droppings.
The bird is lethargic, less active or refusing food.
A young plover shows obvious signs of stunted growth.
Prognosis
The outlook is generally good when infestation is caught early and treated promptly, especially in a bird that is otherwise healthy.
It becomes more guarded in young birds, already weakened birds or in cases of heavy parasite burden left untreated for too long.
Frequently asked questions
Can plover parasitism be transmitted to humans?
No, the digestive nematodes of plovers are specific to birds and do not represent a known risk of transmission to humans.
Does a wild plover necessarily need antiparasitic treatment?
Not systematically. A healthy wild bird often tolerates a low parasite load. Treatment is mainly necessary in captivity or for a weakened bird, following veterinary advice.
How to know if my plover in an aviary is infested?
Only a fecal examination by a veterinarian can confirm roundworm infestation, as visible signs are often late to appear or subtle.
Can this disease be prevented without medication?
Good environmental hygiene, avoiding overcrowding, and regular monitoring greatly reduce the risk, but do not replace veterinary care.
References
WOAH — Organisation mondiale de la santé animale (ex-OIE)
ESCCAP — European Scientific Counsel Companion Animal Parasites
Content reviewed by the TunisieVet editorial team · Updated 23 August 2026
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