โSo sad that wolf has to wear a collar for the rest of its lifeโ.
We recently shared a post about Wolf B2L, the best โbeaver hunterโ we have studied to date. We noted that the battery on his collar died, as we anticipated, this past fall.
Some expressed sadness and anger that he was now burdened for the rest of his existence with this collar. But this is simply not the case so we wanted to explain what actually happens in such instances.
The collars we use have a drop-off mechanism powered by a separate small battery that works regardless of whether the collarโs main battery has died.
A little bit about the collars: we only use Vectronic-Aerospace collars because we think they are the best on the market and have worked very well for us thus far. One of the reasons we really like these collars is also because of the drop-off mechanism in the collar.
Vectronicโs drop off mechanism has worked as expected 97% of the time for usโpretty darn good for collars that are deployed on wild wolves, which are notoriously hard on GPS-collars given their intense way of life.
This drop-off mechanism can be programmed to release (i.e., fall off the animal) after a set period of time (e.g., 2 years) or by a certain date. And like we said, this mechanism will work regardless of whether the main collar battery is drained.
Of course, we try to time it so collars drop-off just before the main battery dies so that we can recover the collar, swap in a new battery, and re-deploy on another wolf. If the collar drops off after the main battery dies, we will never find it but the wolf wonโt be wearing it longer.
Additionally, we can drop any collar remotely if we want to, and have done this many times, often for lone wolves who have dispersed well outside of our area or for collars we think are going to die soon. ย To do so, we just sent a command to the collar via satellite and tell the drop-off mechanism to release. Easy as that.
Now, we think wolves would be just fine wearing a collar for the duration of their lives. Many studies in decades prior put collars (largely telemetry not GPS collars) on that were intended to be on the wolf for their entire life. There was little evidence that the collars stopped those wolves from living a typical and normal life (i.e., little evidence these collars are a โburdenโ).
That said, we still do not want wolves to wear collars any longer than necessary (usually 1.5-2 yrs in our area) and so these drop-off mechanisms are key to ensuring that happens.