Late April in the Greater Yellowstone Ecosystem
Tuesday, April 27th, 2010
It is late April here in Jackson Hole, and that means that we are finally shaking ourselves from the firm grasp of winter. There are bulbs coming up in flower beds around town, and a variety of new songbirds are frequenting the bird feeders at Eco Tour headquarters.
On recent trips, we’ve seen numerous grizzly bears, black bears, wolves, all variety of ungulates. Several days ago, in the Lamar Valley, we were lucky enough to witness one of the local wolf packs chasing an elk heard nearly 300 strong.
The weather remains unsettled, though frigid winter squalls have been replaced by thunderstorms rolling in over the Tetons. Sizable lightning strikes have been seen around Grand Teton National Park, and while it may snow high in the mountains, the majority of the precipitation that falls on the valley floor is rain.
Seasonal shifts are always an active time for wildlife; from bees to birds to bears. As the sun returns, and the snow recedes, creatures of all sorts are on the move, searching for new food, searching for love, establishing their summertime routine.
Pairs of osprey have returned to their nests around the valley, from points so far afield as the Caribbean and South America. Ospreys are monogamous birds, like the trumpeter swan and golden eagle, and they oftentimes use the same nest each year—making small home improvements with the passing seasons. They nest near bodies of water around the valley, and are partial to the Snake River, with its ample trout population.
Meanwhile, six thousand feet upwards, golden eagles are performing their springtime acrobatics, riding updrafts and impressing their mates. During a recent ski tour into the high peaks of the Tetons, the Eco Tour team was circled by multiple eagles. They dropped in low and close—we were up above 11,000 feet on a narrow ridge—and we couldn’t help but feel as though the massive birds were sizing us up relative to their more standard prey; rabbits, rodents, other birds, and the occasional larger mammal. There is no doubt the eagles rule those peaks. With their nearly supernatural hearing and sight, their high level of intelligence, if something happens up there, they know about it.
Back on the valley floor, the retreating snow line has opened up the highways used by hoofed creatures to travel during these transitional times. This means that Pronghorn are beginning to make their long journey back to Jackson Hole from wintering grounds in the flat, high, sage brush plains to the south. Theirs is the longest land mammal migration in the Lower 48—second in North America only to the Arctic caribou.
The National Elk Refuge has cleared out, the elk having begun moving to higher elevations, and farther to the north. The strong spring sun paves their way. Mountain goats and Bighorn sheep have moved from their slightly more tame winter ranges back to the most jagged peaks and sheer cliffs in the Tetons and other ranges. The Yellowstone bison herd has begun to calve, some wolf packs have denned up in preparation for the arrival of pups.
The landscape is not so visibly far along. Sure, the sage brush has started to green up, taking on its classic gray-purple glow, and the grass in town is not far behind. Some trees have begun to bud, though full leaves will still be some time in the making. Gazing upon the snow covered mountains, one wouldn’t now that spring is so fully upon us. But looking close, you can see that all of the pieces of this intricate ecosystem—plants, animals, and otherwise—are readying themselves for the explosion of life and activity that comes with the summer months. As is always the case with spring, there is a sense of hopefulness, enthusiasm, and want for what will soon arrive.
Spring is a special time in the Valley, as all residents shake out the winter cold and cobwebs. Undeniably governed by the same forces as the natural world around us, we here at Eco Tours feel ourselves transitioning as well. We’re readying for all that summer sun. We did some serious spring cleaning. We got ourselves a new Ford Excursion and a fancy new office. Contact us today about our tours, valley happenings, or anything at all.
We’re booking tours now for the summer season. Currently, the parks are empty, the crowds won’t arrive for weeks yet. If you’re visiting the valley now, it’s a great time to feel the true remoteness and ruggedness of this place—without having to deal with mid-winter temps. We hope to hear from you soon!






