FAQ: During the quarantine period, what were the beavers tested for and what were the results?

All beavers arriving from Norway firstly undertook a one month quarantine period at a Norwegian holding facility, associated with Telemark University College. On arrival in Britain they were then subjected to the statutory rabies quarantine of 6 months. This is a DEFRA requirement for all mammals entering the UK, unless under special circumstances. During quarantine the beavers were monitored regularly. Blood and faecal samples were collected for veterinary testing and prior to release all beavers were specifically tested for Salmonella, Campylobacter, Yersinia, Clostridium, Leptospirosis and Tularemia. Faecal samples were tested for general parasites while blood samples were obtained to assess blood biochemistry, haematology and white blood cell counts.

Blood results were compared to reference ranges for both Eurasian and North American beaver species. Any beavers displaying results greatly outside the normal ranges were not released until further veterinary investigations were carried out and those individuals have been retested. High white blood cell counts can indicate infections, which would then have been treated before any release.

Faecal samples submitted for parasitology have shown that beavers do naturally carry internal nematode worms and some animals have tested positive for the beaver fluke Stichorchis subtriquetrus. This fluke or trematode is a parasite that occurs naturally in beavers and is specific to the genus Castor.

Prior to release all beavers were subjected to a full clinical examination by The Royal Zoological Society of Scotland and independent veterinary surgeons to assess ear, eye, skin and body condition as well as dental and skeletal abnormalities. Any beavers with infections, injuries, heavy parasite loads or those who tested positive for any of the veterinary tests stated were not passed fit for release.

Beaver health check copyright SBT Beaver health check copyright SBT

Click here to read the summary report prepared by the Independent Overseeing Vet, Gidona Goodman.



Project partners

The Royal Zoological Society of ScotlandScottish Wildlife Trust
Forestry Commission Scotland

Beaver blog latest

    Comments of support

    "This amazingly useful creature will have enormous benefits to woodland and wetland wildlife. You can play your part by supporting this exciting project." - Chris Packham

    With thanks to

    Beaver Trial Supporters
    People's Postcode Lottery

    See our other supporters

    The Royal Zoological Society of ScotlandScottish Wildlife Trust


    Beavers are back in Scotland!

    On 24 November 2016, the Scottish Government made the landmark announcement that beavers are to remain in Scotland. This is the first time that a mammal has been formally reintroduced in UK history.

    The trial population of beavers remains in Knapdale, and the Scottish Beaver partners are now focussing their efforts on re-enforcing this population to ensure its long term future.

    Boosting the Knapdale beaver population

    For updates on the beaver re-enforcement project, please visit the website of the Scottish Wildlife Trust or the Royal Zoological Society of Scotland by clicking on the adjacent logos.

    The Scottish Beaver Trial website

    Now that the Trial has ended, this website will no longer be updated. However, if you would like to browse our historical records on the website, please click the button to continue.

    Scottish Beaver Trial RZSS Scottish Wildlife Trust