California Department of Fish and Wildlife Warns of Domestic Deer
What at first was a welcome development in the ongoing deer population crisis at Yosemite National Park may be taking a turn for the unusual.
Though initially reassuring after the recent collapse of the deer population at Yosemite, a new migratory trend that shows herds of deer from nearby habitats moving into the forest now has park and state officials alike concerned. "At first, we thought it was a breath of fresh air," says Dr. Sam Bradwardine, an ecologist who's studied the Yosemite region for over thirty years. "Deer overpopulation can be a serious problem due to the historic eradication of keystone predators, but they're still a vital part of their local ecosystems. A sudden collapse in their population of that magnitude could have been just as disastrous to the environment as the elimination of wolves in the 19th century threatened to be, so when we saw other herds flooding into the park to take advantage of suddenly abundant food resources, we were relieved. Now, though, we aren't so sure." While the migratory trend initially showed exclusive influxes of nearby surplus population into the park following available vegetation, recent study shows unusual changes in behavior that imply more deliberate migration behavior.
"We started tagging adult females seen with fawns after the collapse," says Evelyn Spatz, a park ranger and tour guide at Yosemite who specializes in working with the park's herds. "We wanted to make sure that we could keep track of them, since they were going to be responsible for replenishing the herds going forward. It wasn't an immediate cause for concern when we started to notice a few individuals moving pretty far afield from the park; it made sense that following a population collapse, mothers might leave the area to make distance from whatever caused it, but then we started noticing something... weird."
"The individuals leaving the park were coming back, and more importantly, they're doing it cyclically," Dr. Bradwardine explains. "Of the deer we've tagged, there are 9 key individuals who have been leaving and returning to the park on a weekly basis, and each time they return, it corresponds with a new migratory influx. We haven't seen this kind of 'gathering' behavior before, and we especially haven't seen it oriented around what appear to be dominant females like this."
"The tourists love it, but it has all of us worried," Ms. Spatz said when we interviewed her while she was overseeing one of the observation areas in Yosemite. "Ever since this started, the deer have been way more friendly to humans - I've gotten at least a dozen proposals from local tour companies wanting to sell a 'feed the deer' attraction." Despite the lucrative opportunity, Evelyn - and most of her colleagues - are cautious. "Animals don't show drastic changes in behavior for no reason, and prey animals like deer in particular aren't supposed to be this comfortable around one of their primary natural predators. Deer are weird and I love them, but they're also a lot more dangerous than people give them credit for; from what I've heard, it sounds like this new social behavior isn't just local to Yosemite, and it's only a matter of time before someone tries something they shouldn't and gets a hoof through the ribs."
In light of these events, the California Department of Fish and Wildlife has issued a formal warning against socializing with California State deer populations in hopes of curbing the recent social media trend of "herd selfies" taking off on TikTok and Instagram, and is establishing a perimeter of volunteers drawn from the Parks service around state borders to monitor any migration across state lines.
There is currently no news as to when Yosemite National Park intends to reissue hunting licenses.