Psoroptes Monitoring Kicks Off with Collaring of 27 Bighorns


SOKS Bighorn Capture 27 bighorn sheep from the South Okanagan Similkameen populations were radio-collared in February 2015.

Captures included 16 females and 11 males, distributed across the lower Similkameen from Hedley to Olalla, and South Okanagan areas between Penticton and Oliver.

The purpose is to better understand bighorn movement patterns so that we can minimize the risk of parasite and disease transmission among herds. We’re also using collared animals to identify lamb production and survival rates in the population, and assess annual mortality rates for adult sheep.


GPS collars are satellite linked, providing us with location fixes every 13 hrs and notifying us when collars have been motionless for 3 hrs. The collar motion detectors give us an opportunity to investigate the cause of suspected sheep mortalities as soon as possible.

You Can Help!

Collars are marked with numbered tags to enable visual identification during monitoring surveys. If you see these sheep and would like to report your observations, please note their collar numbers and tag colours. Use the contact form here to send us your observation details and photos.

Pamela Hengeveld

Wild sheep specialist and founder of WILDLIFE.FISH. Also known as the quiet neighbour with the really big freezer.


  1. I saw 2 collared sheep both full curl rams near Ashcroft. I didn’t notice the collars until I looked at the pictures as they were taken with a zoom lens.

    • Hi Steve, thank you for sharing your observation! If you are interested in sending me a copy of your photo I might be able to tell you more about the collared sheep you saw. You can use the form on this website’s contact page to upload the photo, or send it by email to me

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