In December 2023, this blog reported the discovery of brown bullheads (Ameiurus nebulosus) presenting with black skin masses. Histological analyses had at the time confirmed that these were melanomas,...

Les animaux ne reconnaissent pas les frontières provinciales ou nationales, et comprendre leurs déplacements, leur santé et leurs populations nécessite la collaboration de nombreux organismes œuvrant ...

Animals do not recognize provincial or national borders, and understanding their movements, health, and populations requires many organizations working toward a common goal. At the CWHC’s Ontario/Nuna...

Les maladies aviaires constituent un sujet important en approche Une seule santé. La salmonellose, la coccidiose, l’influenza aviaire et le virus du Nil occidental, pour n’en nommer que quelques-unes,...

Avian diseases are a significant topic in One Health. Salmonella, coccidia, avian influenza, and West Nile virus, to name a few, are well known for their potential to In this context, one group of pat...

La saison des moustiques est de retour, tout comme le virus du Nil occidental (VNO). Chaque été, le virus refait surface dans certaines régions du Canada, circulant entre les moustiques et les oiseaux...

Mosquito season is back, and so is West Nile Virus (WNV). Each summer, the virus re-emerges across parts of Canada, cycling between mosquitoes and birds, with occasional spillover into humans and othe...

Two river otters from the Soldier’s Bay area in Cape Breton (Nova Scotia) were submitted to CWHC-Atlantic for necropsy. The otters had been spotted in the field exhibiting regions of hair loss on thei...

Les rats sont un enjeu de santé publique, mais nous ne les surveillons pas comme tel La santé publique comprend depuis longtemps qu’on ne peut pas gérer ce qu’on ne mesure pas. Avant de prescrire un m...

Rats are a public health issue, but we are not monitoring them like one Public health has long understood that you cannot manage what you do not measure. Before a doctor prescribes medication for diab...

Le Portail des partenaires du RCSF constitue un objectif stratégique clé au sein du bureau national depuis plus d’une décennie. Il permet de fournir des données et des rapports essentiels aux partenai...

The CWHC’s Partner Portal has been a key strategic goal within the National Office for over a decade now and allows us to provide essential data and reports to Federal, Provincial, and Territorial (FP...

Depuis décembre 2024 un total de 159 cas de rage du raton laveur a été confirmé au Québec. La réémergence de cette maladie qui a débuté en Estrie progresse maintenant vers la couronne sud de Montréal....

Since December 2024, a total of 159 cases of raccoon rabies have been confirmed in Quebec. The re-emergence of this disease, which began in Estrie, is now spreading toward the south shore of Montreal....

Le Centre régional Ouest/Nord du RCSF fait partie du Department of Veterinary Pathology, Western College of Veterinary Medicine à Saskatoon. En plus de nos responsabilités diagnostiques en matière de ...

The Western/Northern Regional Centre of the CWHC is part of the Department of Veterinary Pathology at the Western College of Veterinary Medicine in Saskatoon and, in addition to our wildlife diagnosti...

The Canadian Wildlife Health Cooperative Atlantic bat team is asking the public to report sightings of bats by calling the Atlantic Bat Hotline at 1-833-434-BATS (2287).

De nombreux problèmes de santé chez les animaux sauvages, dont la grippe aviaire, touchent également l’Homme et d’autres espèces animales. Les approches de recherche traditionnelles sont souvent ineff...

Many wildlife health issues, including avian influenza, also impact humans and other animals. Traditional research approaches are often ineffective at tackling these challenges. Using a One Health app...

Ce printemps, un atelier de nécropsie a réuni des partenaires de partout en Alberta afin d’optimiser la surveillance des populations de mouflons des Rocheuses sur le terrain. L’événement, organisé par...

This spring, a collaborative necropsy workshop brought together partners from across Alberta to strengthen field-based monitoring of bighorn sheep populations. The event, organized by the Wild Sheep F...

Suite à la détection des protozoaires Toxoplasma gondii et Sarcocystis neurona chez des mammifères marins échoués présentant des degrés variables de méningo-encéphalite, les chercheurs ont redoublé d’...

Since the original detection of the protozoa Toxoplasma gondii and Sarcocystis neurona in stranded marine mammals with varying degrees of meningoencephalitis, there have been increasing efforts to scr...

Deux femelles bélugas présentant des déformations marquées de la colonne vertébrale se sont récemment échouées sur les berges du Saint-Laurent. Bien que ce type de déformation ait déjà été observé sur...

Two female belugas with marked spinal deformities recently washed ashore on the banks of the St. Lawrence River. Although this type of deformation had previously been observed in living animals, no in...

À la fin décembre 2025, nous avons commencé à recevoir des signalements d’un centre de réhabilitation de la faune à Ottawa, en Ontario, concernant de nombreux oiseaux malades soupçonnés d’être atteint...

At the end of December 2025, we began receiving reports from a wildlife rehabilitator in Ottawa, ON regarding numerous sick finches suspected to have Mycoplasmosis. The birds were all described as hav...

Maintenant que le printemps est arrivé, les chauves-souris commencent à sortir de leur hibernation ou à migrer de nouveau vers le nord, et certaines personnes ne manqueront pas d’en rencontrer. Plusie...

Now that spring is upon us, bats have started to emerge from hibernation or migrate back north, and some people are bound to encounter them. Many people are afraid of bats, some due to their link to s...

La faune canadienne et les efforts collaboratifs en recherche sur la faune ont été mis en valeur lors de la 73e conférence internationale annuelle de la Wildlife Disease Association (WDA). La conféren...

Canadian wildlife and collaborative efforts in wildlife research were showcased at the 73rd annual international Wildlife Disease Association (WDA) conference. The conference was held in Victoria, Bri...

The Canadian National Bat Health Program, coordinated by the Canadian Wildlife Health Cooperative (CWHC), received its funding since its inception over a decade ago through several contribution agreem...

The Canadian National Bat Health Program, coordinated by the Canadian Wildlife Health Cooperative (CWHC), received its funding since its inception over a decade ago through several contribution agreem...

Un grand nombre de carcasses de grands brochets et de crapets-soleils ont été observées à la mi-mars sous la glace des lacs des Fauvel situés à Blainville dans la région des Laurentides au nord de Mon...

A large number of carcasses of northern pike and sunfish were observed in mid-March under the ice of the Lacs Fauvel located in Blainville, in the Laurentides region north of Montreal, Quebec. Observe...

En janvier 2026, la monographie (en anglais) suivante a été publiée dans le Journal of North American Bat Research : « Welfare and Handling Recommendations for Bat Surveys in Canada ». Cet article est...

In January 2026, “Welfare and Handling Recommendations for Bat Surveys in Canada” was published open source as the first monograph in the Journal of North American Bat Research. The article was the cu...

When the first highly pathogenic avian influenza outbreak occurred in Ontario in March 2022, the Canadian Wildlife Health Cooperative (CWHC) Ontario/Nunavut node significantly increased the annual num...

When the first highly pathogenic avian influenza outbreak occurred in Ontario in March 2022, the Canadian Wildlife Health Cooperative (CWHC) Ontario/Nunavut node significantly increased the annual number of wildlife cases brought in compared to the previous year:  increasing from ~500 cases a year in 2021 to 1,278 cases in 2022 and now 1,556 cases in […]

Free-ranging wild ungulates are integral to the health and well-being of Canadian socioecological systems, contributing various One Health benefits (e.g., nutrient cycling, sustainable food resources)...

La surveillance de la santé de la faune est essentielle, car les maladies peuvent influencer l’abondance des espèces, et plusieurs de ces maladies peuvent également toucher les animaux domestiques et ...

Monitoring wildlife health is important, as diseases can impact the abundance of species, and several can also affect domestic animals and people with significant economic and social costs. Examples o...

Urban Norway and black rats can have diverse and significant negative impacts on urban landscapes and residents. A variety of different approaches have been developed for measuring rat populations to ...

Uncertainty in the geopolitical landscape is having serious downstream effects on the CWHC. For the past twenty plus years, our multi-source core funding has remained at approximately the same level, ...

Every fall in Ontario, thousands of hunters head into the woods in pursuit of white-tailed deer. For many, hunting is a way to source meat and connect with nature, but it also presents an important op...

Chaque automne en Ontario, des milliers de chasseurs se rendent en forêt à la recherche de cerfs de Virginie. Pour plusieurs, la chasse est à la fois un moyen de se procurer de la viande et de se rapp...

Qu’est-ce que le ver des méninges et pourquoi est-ce important? Le ver des méninges est un nématode parasite qui infecte habituellement le cerf de Virginie, son hôte naturel. Chez le cerf de Virginie,...

What is Meningeal Worm and Why Does It Matter? Meningeal worm is a parasitic roundworm that typically infects white-tailed deer, its natural host. In white-tailed deer, the parasite carries out its li...