Are you interested in the latest results of the Oak Bay Deer project? Lead researcher Dr. Jason T. Fisher and wildlife veterinarian Dr. Adam Hering recently presented the results of the project to the Botstiber Institute for Wildlife Fertility Control. You can view the Webinar to the right, or access full details at https://wildlifefertilitycontrol.org/webinar-11-blacktail-deer/
Expanding on the 2019 findings of where deer can be found in Oak Bay, we have been able to identify that deer hone in on areas with lush green vegetation and large-sized residential lots (as well as parks, green spaces, and golf courses). Results of our research to date indicate that the conversion of the historic drought-resistant Garry oak ecosystems into the lush, landscaped urban environment of Oak Bay is likely supporting an urban Columbian black-tailed deer population more than the native Garry oak ecosystem would.
Additionally, after just one year of immunocontraception (IC: in the fall of 2019), the relative abundance of fawns decreased by nearly 60% in 2020. The adult deer population has stayed largely constant over the first year of IC (approx. 100 deer in all of Oak Bay), but the decrease in the abundance of fawns should result in a decrease in adult deer as fewer fawns will be maturing into adulthood.
For more information, please go to our research page: https://uwss.ca/our-research/
We’ll keep you updated!
Alina Fisher, BSc MA (Comms) PMP, Ph.D. Candidate, University of Victoria, was the most recent recipient of the Dr. Ian and Joyce McTaggart Cowan Scholarship in Environmental Studies at the University of Victoria. Alina has an extensive background in wildlife biology, ecology, and science communication, coupled with an incredible sense of compassion and empathy for wildlife, urban and otherwise.
Alina left Romania in her early childhood, and in an interview with The Nature Trust of British Columbia, she movingly describes her connection to nature and wildlife as the “constant” among much upheaval and uncertainty.
The UWSS is so fortunate to have Alina working with us. She has guided our public education and communications with a compassionate, measured, and even hand; always listening to and respecting multiple perspectives. We are excited for Alina as she pursues her Ph.D., and are grateful for her expertise. She has been instrumental in helping communities have a better understanding of the role, and need, for urban wildlife.
by Anne Drummond
Along with warmer, brighter days and burgeoning vegetation growth, deer fawning season is beginning, with the first fawns already sighted in Oak Bay and other municipalities.
During September and October 2019 an immuno-contraceptive was administered to 60 does, all of whom are marked with numbered or coloured ear tags. In addition, a control group of 20 does who did not receive the immuno-contraceptive are marked with a coloured collar and large pink tags attached to the collar.
We are expecting that only the control group of does and any other does that did not receive the immuno-contraceptive will give birth. So this season we are anticipating a reduction in births by 60-90 fawns.
Does are very protective of their fawns and if threatened will defend their youngsters. A human waving their arms and yelling at a doe, and merely the presence of dogs (whether leashed or unleashed, seems threatening to their fawns safety – even if you can’t see the fawns nearby. So in the interests of avoiding interactions with protective does we recommend the following behaviours when walking your dog or strolling the neighbourhood streets:
For more tips on living with Urban Deer visit UWSS.ca
BCSPCA WildArc. 855 622 7722. 1020 Malloch rd. Victoria
If you saw the now familiar orange safety vests and a man carrying what looks like a rifle (he’s a wildlife veterinarian and it’s a dart projector!) you’ll know that our field team was once again out in the field this March.
The purpose of the fieldwork was two-fold. One was to check the fit of the collars placed on 40 does in the Fall of 2019. The second purpose of being in the field this winter/spring was to re-mark a control group.
Collar Fit
Because we were out in the field again to capture a control group, we used the opportunity to double-check on collar fit. There were some concerns voiced from the community that the collars used to identify does that have received immuno-contraception are too tight, and we have been following those concerns up diligently. We checked on many of the does that were specifically reported to us since September with concerns of a too tight collar, and Dr. Hering, our wildlife veterinarian, was able to report that in fact the collars are fitting well. Nine does were re-captured, their necks re-measured to look for growth and that the collars are not causing any problems. None of the collars that were checked are fitting too tightly or appear to be causing the animals any problems and so it was not necessary to replace or remove any collars because of inappropriate fit. The fit is very similar to that of a dog collar on a dog, which is what he was aiming for. However the collars can appear to fit tighter than they actually are, due to winter fur growth.
Although from a distance it can look as though a collar is too tight, when you’re up close it is much easier to tell how much room there actually is under the collar. Dr. Hering has been really pleased with how the deer’s necks look with the identification collars, there is far less chafing than with the much looser GPS collars used on the original control group!
Control Group
Our original control group of 20 (down to 17 due to mortalities) were wearing GPS collars (those loose ones with the big bling!) that were timed to automatically drop off this February and March. Due to an unexpected provincial requirement that delayed immuno-contraception by a year, we need a control group for at least another year. So, as the original collars “blow” off, we re-captured some of the same animals (and in some cases new animals), for 18 does in total, and fit them with new colourful marker collars. These collars are even more light weight than the originals, have only 2 smaller tags, and were provided to us by Margo Supplies (https://www.margosupplies.com/ca-en/), a family-owned and operated company with over 35 years of safe, effective, non-lethal wildlife management solutions. We have loved the privilege of working with Margo Supplies.
If you see an animal with pink tags on her collar you will know that she is a control animal and was not given contraception this year!
Impact of COVID-19
Although we had hoped to re-mark 20 does and do a few more collar checks (we’ve also been taking a blood sample to help determine pregnancy rates, results not in), due to COVID-19 and the health guidelines for physical distancing, we have wrapped up field work until September 2020 when we will head out again to booster the does that received IC in the Fall of 2019, and give a primary vaccine to up to 60 new does.
In the meantime, we hope you and your families and friends keep healthy and safe.