Wolverines have made the news fairly frequently over the past few weeks. Here are a few articles that just came out, and a few that I missed posting earlier.
First, another update on the Alberta wolverine research, which I discussed briefly last week, can be found here. This article is longer and does a much better job of discussing the varied factors that influence where wolverines appear on the landscape.
Second, DNA tests confirm that the wolverine recently spotted in California is the same wolverine first detected in 2008. An article in the LA Times contends that this means that the animal is nearing the end of its life, since wolverines are generally thought to average about a ten year lifespan, and this animal is at least seven. I’ve heard rumors that a wolverine known to be much older was recently recaptured on a project, however, so let’s hope that the Sierra wolverine proves to be equally long-lived – maybe by then a female will find her way to California as well.
In the Bitterroot National Forest in Montana, forest biologists are continuing a project to assess the wolverine population, using DNA and Audrey Magoun’s camera techniques. This is one of the many wolverine projects that have sprung up over the past few years, indication of a heightened interest in a species that was once overlooked. Another ongoing project continues the work begun in Idaho to assess the influence of motorized and non-motorized backcountry recreation on wolverines. Operating for a second year in the Tetons, this study was featured in a June 2014 article that I missed posting because I was in Mongolia. It’s worth the read, and it’s great to think how much this project has accomplished since it started in 2009. Although this article has a typically controversy-generating headline (“Can wolverines and backcountry skiers coexist?”), the alarm is misplaced. The answer to the question is “yes,” so let’s dispense with the need to get people worked up. The real question revolves around whether either of these snow-obligate species will continue to prosper in the era of diminishing snowpack.
In Washington, researchers recently captured a 30 pound (!) male wolverine, as part of the final season of the decade-long North Cascades wolverine project. The article is fairly detailed and I’d like to focus a little more on this project in a separate post, but in the meantime, four observations. One – that’s an impressively large wolverine! Two, I’m so glad to hear that at least a few people did something interesting on Super Bowl Sunday – not just this year, but last year as well. Three, I’m assuming they named this wolverine “Special K” after the ketamine used in the capture, which betrays a somewhat dark aesthetic on the part of the researchers. Four, and most interesting, it appears that this wolverine is the son of Rocky, the original male occupying the area. Rocky vanished and was replaced by his son, Logan, who has now moved to a different location, apparently displaced by his half-brother Special K – the one named after the drug. Definitely some interesting social interaction data, but it also really piques my interest in how wolverines maintain enough genetic diversity to avoid fatal bottle-necks, since these males are taking over territories that most likely overlap with those of their mothers and/or their sisters.
Also in Washington, a news video and an article with a second video feature work on wolverines near Snoqualmie Pass. This is interesting, but the reporter does the same thing that generally drives me crazy when people talk about wolverines: he equates presence with a reproductive population, stating that wolverines are “moving south in spite of climate change,” which implies that there’s a resident population. I’m excited to see wolverine detections in new locations, but there are two things to keep in mind: first, as I mentioned, a wolverine or two is not necessarily a breeding population, and second, are these detections the result of wolverines moving in to new locations and expanding south, or are we finding them because we now have the motivation and the technology to look in places where we weren’t looking before? (I incline towards the former because I’m invested in the idea that wolverines are recolonizing, but that may just be my bias. It’s a question worth asking. Cameras and DNA make it easier to ‘observe’ the landscape in a sustained way that was unavailable to us until recently.) In any case, it’s nice to see yet another study utilizing Audrey Magoun’s camera technique.
Finally, for Montana residents, if you have ever felt the need to declare your allegiance to the conservation of climate-sensitive wildlife with a license plate for your (hopefully hybrid) car, you can now buy a specialty plate featuring a wolverine. The proceeds benefit the Swan Ecosystem Center and Northwest Connections, environmental groups that help monitor wildlife and work towards ecosystem conservation.
Wolverines may or may not be expanding their range, but interest in wolverines definitely is. It’s exciting to see.