Keeping deer out of airports
left a comment a couple of weeks ago linking to Transport
Canada's Deer Exclusion Devices and Deterrent Techniques. While we were
researching our own deterrent, I read a similar document
put out by a U.S. state (can't remember which one) noting the best way
to keep deer off airport runways. It sounds like airports are
working hard to find a way to deter deer!
I've excerpted a few of
Transport Canada's key findings about deer deterrents since they match
key to success when using frightening methods and repellents is to use
them at the first sign of a deer problem." This has been our
experience as well. Once deer find that tasty strawberry plant,
it's going to take a lot more than a gentle clanging to chase them
away. But if you deter the deer before they find your garden's
tasty crops, they will keep out.
general obstacle to the use of sound for effective animal control is
Many animals adapt to new sounds and learn to ignore them if they are
not associated with real danger.... Shooting has been used to
frighten or kill deer in agricultural fields.... In these situations,
deer are often killed to reinforce the effectiveness of non-lethal deer
scaring devices." I have to admit that I back up our deer
deterrents with a bit of hunting, and I think it helps.
cannons can be more effective at dispersing deer if the frequency of
the explosions is varied and if the cannons are moved every second or
third day of use to a different area.... Motion-activated
exploders, triggered by passing deer were more effective than exploders
that fired at regular intervals. Thus, the exploders only fired
when a deer was close by, which made habituation less likely."
We're not using cannons (boy was someone desperate!), but Mark is
working on making our deer
regular to get the same effect.
Canada notes that ultrasonic noise, reflecting surfaces, and blinking lights
That's been our experience as well. They note that odor and taste-based
repellents "are only
even partially effective at protecting very small areas."
Stay tuned for more gems
from Transport Canada later in the week!