Author: Mark Brunson

Mark Brunson recently retired as a professor of Environment and Society at Utah State University, and he continues to study how people affect natural environments and are affected by them, especially in the deserts of the Great Basin and Four Corners regions. Mark is passionate about connecting science to people who can benefit from it. He has led outreach programs for land managers about wildfire and ecological restoration, and he serves as science director for The Nature Conservancy’s Canyonlands Research Center while also working with two Utah-based conservation nonprofits, Bear River Land Conservancy and Sageland Collaborative.
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Close Encounters vs. Survival

Close Encounters vs. Survival: Dusky Grouse Dendragapus, obscurus Courtesy US FWS, Ryan Hagerty, Photographer
Dusky Grouse, Dendragapus obscurus
Courtesy US FWS, Ryan Hagerty, Photographer
Just about everyone loves seeing wildlife in its natural habitat. Usually, we see animals at a distance – near enough to recognize, but not near enough to touch. There’s always that temptation, though, to get a closer look, to have that truly memorable close encounter.

Ruffed Grouse, Bonasa umbellus, in Snow Courtesy Utah Division of Wildlife Resources
Ruffed Grouse in Snow
Bonasa umbellus
Utah Division of Wildlife Resources
Some years ago, a friend and I went cross-country skiing in Utah’s Bear River Range. It was one of those magical winter mountain mornings – the forest still and silent, snow falling very lightly around us. After a while we stopped for a snack in the shelter of a large fir tree. For a few minutes we chatted quietly, then we just listened. I heard a small rustling noise above me, looked up, and was surprised to see a grouse, perched calmly on a branch next to the tree trunk, so close that if I stood up straight, I could almost look it in the eye. I tapped my companion on the shoulder and pointed, then we grabbed our skis and moved slowly away, hoping not to disturb the bird any more than we already had.

Of course we were tempted to stick around, enjoying a memorable close encounter with a wild bird that many Utahns will never get to see in their lifetimes. But we were right to resist temptation.

So, what was this bird doing, anyhow, taking a risk by staying so close to two humans? First of all, it was a forest grouse. Utah has two species of these vaguely chicken-like birds, dusky grouse and ruffed grouse, and they both tend to avoid ground predators by sitting quietly in dense foliage rather than flying away like most other birds would.

But staying this close? That brings me to the second reason. It was winter. Animals that remain in Utah’s mountains year-round face a special challenge: balancing the need to eat with the need to keep warm. Foraging for food requires energy. During the growing season, there’s usually enough to eat to easily meet a daily calorie requirement. But in winter food is scarcer, and for plant-eating animals, the food that remains has a lower nutrient content. Not only that, but keeping warm also requires energy, and it’s harder to keep warm if you’re moving around in freezing weather, away from shelter. If the reason you’re moving around is not to find food but to escape a potential predator, that loss of calories is hard to make up.

Dusky grouse have a diverse plant diet in the warmer months, but their winter diet consists almost entirely of Douglas-fir and pine needles. It’s an abundant food source, but not an especially nutritious one. So, if they can escape a potential threat by standing still, instead of expending calories by flying to another tree, they’ll choose the energy-conserving option.

That same principle of energy conservation applies to other animals that are active in winter. The less they move around in the open air, the better. For mammals that are too heavy to walk on the snow surface, such as deer and elk, it takes extra energy to flee from a predator – or from a winter recreationist – while slogging through deep snow. By winter’s end, the cost of fleeing from possible dangers can add up – maybe even making the difference between survival and starvation. That’s why, when we’re out enjoying Utah’s backcountry in wintertime, we should always resist the temptation to have a close encounter of the wild kind.

I’m Mark Brunson, and I’m wild about Utah’s winter wildlife.

Credits:

Images Courtesy US Fish & Wildlife Service, Ryan Hagerty, Photographer, https://www.fws.gov/media/dusky-grouse-2
Featured Audio: Courtesy & Copyright © Friend Weller, Utah Public Radio upr.org, and audio Courtesy & © Anderson, Howe and Wakeman
Text: Mark Brunson, https://www.usu.edu/experts/profile/mark-brunson/
Additional Reading: Mark Brunson and Lyle Bingham, https://bridgerlandaudubon.org/

Additional Reading

Wild About Utah pieces authored by Mark Brunson

Miller, Matthew L., The Grouse in Winter, Cool Green Science, The Nature Conservancy, https://blog.nature.org/2014/01/16/the-grouse-in-winter/

Environmental Impact of Winter Recreation, American Trails, https://www.americantrails.org/resources/environmental-impacts-of-winter-recreation

Winter Range Disturbance Fact Sheet 17, Utah Division of Wildlife Resources, Mule Deer Working Group, Western Association of Fish & Wildlife Agencies and Utah Department of Natural Resources, State of Utah, https://wildlife.utah.gov/pdf/mule_deer/mdwg-17_winter_range_disturbance.pdf

Leavitt, Shauna, Western Forest Grouse, Wild About Utah, November 5, 2018, https://wildaboututah.org/western-forest-grouse/

Carpenter, Chuck III; Farnsworth, Skyler; and Dahlgren, David K., “Forest Grouse in the Fall” (2020). All Current Publications. Paper 2080.
https://digitalcommons.usu.edu/extension_curall/2080
also https://wildlife.utah.gov/pdf/upland/forest_grouse_in_the_fall.pdf

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Cuckoo Bees

Cuckoo bees: Indiscriminate Cuckoo bee Courtesy & © Mark Brunson, Photographer
Indiscriminate Cuckoo Bee
Courtesy & © Mark Brunson, Photographer

Indiscriminate Cuckoo bee Courtesy & © Mark Brunson, PhotographerIndiscriminate Cuckoo Bee
Courtesy & © Mark Brunson, Photographer

I’d like to tell you a crime story. At least, it would be a crime story if told from a human perspective. But is it still a crime story if it’s about the natural world? I’ll tell it and then let you decide for yourself.

First let me set the stage: Not long ago I was hiking in Northern Utah’s Bear River Range. It was the height of wildflower season, and I was enjoying the colorful variety of blossoms along the trail. I stopped to admire a tall, showy plant with dozens of purplish-green blossoms: Frasera speciosa, commonly known as monument plant or green gentian. It’s often seen near the top of Logan Canyon, but what struck me about this particular monument plant was that it was full of bumble bees.

I knew that a Utah-based conservation science organization, Sageland Collaborative, is asking community volunteers to help them measure bumble bee diversity in the state, so I took out my phone and snapped a few photos. Later I uploaded the best photos into an app called iNaturalist so they’d end up in the Utah Pollinator Pursuit database maintained by the Utah Division of Wildlife Resources with Sageland’s help. Then I waited to learn what species of bumble bee I’d seen. The answer came back: indiscriminate cuckoo bumble bee. I thought: What an unusual name. I needed to know more.

It turns out “indiscriminate” simply means that, unlike many native bees that are particular about what they eat, this species doesn’t much care where it gets its nectar. As for “cuckoo”? Like the birds they’re named after, these bumble bees are thieves.

Or to say it more scientifically: these bumble bees are kleptoparasites. Parasites – animals that take resources they need from other species to the detriment of those species – and “klepto,” as in stealing. Like cuckoos or cowbirds, they lay their eggs in the nests of other bumble bee species, letting the workers from the host species do the work of raising them.

Here’s where our crime story gets even more sinister. When a cuckoo bumble bee queen finds a suitable nest to rob – one with a good-sized group of workers to raise the bee larvae, but not so many workers that they can easily protect their queen – she kills the host queen and becomes part of the colony, laying her alien eggs for the host workers to feed.

Cuckoo bumble bees don’t need their own workers, so they’re less often seen on wildflowers. In fact, there’s a good chance that some of the other bumble bees on my monument plant – the ones I didn’t get a picture of – were members of the host species. They also don’t need to take pollen back to a nest of their own, so they don’t have those “pollen baskets” we often see on the hind legs of female bumble bees.

But they do move pollen from flower to flower when it sticks to their bodies as they feed. In other words, they do play a role in sustaining the wildflowers we enjoy every summer. So is this really a crime story? Or is it just another example of the amazing diversity of behaviors found in nature? While you’re deciding about that for yourselves, I hope you get a chance to enjoy watching Utah’s various kinds of bumble bees as they do their all-important work.

I’m Mark Brunson, and I’m wild about Utah’s native bees.

Credits:

Images Courtesy & Copyright Mark Brunson, Photographer
Featured Audio: Courtesy & © Kevin Colver, https://wildstore.wildsanctuary.com/collections/special-collections and J. Chase and K.W. Baldwin. https://upr.org/
Text: Mark Brunson, https://www.usu.edu/experts/profile/mark-brunson/
Additional Reading: Lyle Bingham, https://bridgerlandaudubon.org/

Additional Reading

Wild About Utah pieces authored by Mark Brunson

Sheffield, Cory S., Cuckoo bees, Epeoloides pilosula, The Xerces Society, https://www.xerces.org/endangered-species/species-profiles/at-risk-bees/cuckoo-bees

Smale, Parker, Understanding cuckoo bumble bees: terrors or treasures?, Wildlife Preservation Canada, February 29, 2024, https://wildlifepreservation.ca/blog/understanding-cuckoo-bumble-bees-terrors-or-treasures/

Barth, Amanda, The Unique Lives of Cuckoo Bees, Sageland Collaborative, July 25, 2024, https://sagelandcollaborative.org/blog/2024/7/25/the-unique-lives-of-cuckoo-bees

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Ute Ladies’ Tresses – Utah Orchids

Ute Ladies' Tresses at the Mendon Meadow Preserve, Bear River Land Conservancy, Courtesy & © Mark Brunson, Photographer
Ute Ladies’ Tresses, Spiranthes diluvialis, at the Mendon Meadow Preserve
Bear River Land Conservancy
Courtesy & © Mark Brunson, Photographer

The Mendon Meadow Preserve, Bear River Land Conservancy Courtesy & © Mark Brunson, Photographer The Mendon Meadow Preserve
Bear River Land Conservancy
Courtesy & © Mark Brunson, Photographer

Bumblebee on Ute Ladies' Tresses at the Mendon Meadow Preserve, Bear River Land Conservancy Courtesy & © Mark Brunson, Photographer Bumblebee on Ute Ladies’ Tresses at the Mendon Meadow Preserve
Bear River Land Conservancy
Courtesy & © Mark Brunson, Photographer

It’s a warm summer evening on the west side of Cache Valley, where a small group of volunteers has gathered beside a green pasture. We hear the rattling bugle calls of sandhill cranes in the distance. A Swainson’s hawk scolds us as it circles overhead. As we walk into the field, our steps disturb dragonflies and leopard frogs. But we’re not here for the wildlife. We’re after something rarer: orchids!

Wait, what? Orchids? You mean those delicate tropical plants with colorful blossoms that city folks grow in humid greenhouses? Well, yes actually. It turns out that orchids grow on almost every type of land surface across the globe, including some in Utah.

The orchid we’re seeking has drawn the attention of the federal government. You see, while the orchid family has nearly 28,000 species worldwide, many of those are rare. The one we’re looking for, called Ute Ladies’-tresses, is on the federal Threatened Species list, which gives it legal protection from human impacts until it’s no longer at risk of disappearing.

In Cache County, Ute Ladies’-tresses are guarded by the Bear River Land Conservancy, a nonprofit whose mission is to protect open space and working farms and ranches in northern Utah. After orchids were found in a pasture near the small town of Mendon, the Conservancy received funding to purchase and manage the land in ways that could help the orchids to thrive, and to provide data to the U.S. Fish and Wildlife Service about how the population is doing.

That’s why we volunteers are gathered in a pasture on a Friday evening. Our job is to carefully walk the property, looking for blossoms. When one of us sees an orchid in bloom, we mark the spot with a bamboo plant stake. Then someone trails along behind them – usually that’s me – and records the location using a global positioning system. By taking these GPS measurements, we not only count how many plants have flowered that year, but we also map their locations to learn where we might be losing or gaining orchids over time.

Ute Ladies’-tresses has narrow leaves, hard to distinguish from the surrounding grasses and sedges and rushes. But then it sends up 1-5 flower stalks, up to a foot high. Each stalk has numerous small white flowers arranged in a graceful spiral. The plant likes to grow on solid ground that floods at some point in the year – a streambed that’s dry except during spring runoff, or a flood-irrigated pasture like the one in Mendon. At our site, the first flowers emerge around Pioneer Day, and new ones continue to appear till about Labor Day.

Monitoring this population since 2013, we’ve learned a lot about Ute Ladies’-tresses. One key finding is that flower numbers fluctuate widely from year to year. Our highest count was nearly 2,000 flowering specimens in 2017. But in the very dry summer of 2021, we counted fewer than 30. That year was scary if you’re trying to protect a rare plant, But these orchids live for several years, flowering only when conditions are right, and last year we found more than 1,400.

You see, even if a plant is rare, that doesn’t have to mean it’s fragile. Some rare plants are, to be sure, but Ute Ladies’-tresses is resilient. In fact, last fall the Fish and Wildlife Service proposed removing the species from the Threatened list. One reason they feel they can do so is the continued protection it gets from groups like Bear River Land Conservancy. And so I look forward to many more August evenings in a Mendon meadow, sharing time with this lovely orchid.

I’m Mark Brunson, and I’m wild about Utah’s rare plants.

Credits:

Images Courtesy & Copyright Mark Brunson, Photographer
Featured Audio: Courtesy & © Kevin Colver, https://wildstore.wildsanctuary.com/collections/special-collections and J. Chase and K.W. Baldwin. https://upr.org/
Text: Mark Brunson,
Additional Reading: Lyle Bingham, https://bridgerlandaudubon.org/

Additional Reading

Wild About Utah pieces authored by Mark Brunson

Ute Ladies’ Tresses in Wet Pasture, Bear River Land Conservancy, https://www.bearriverlandconservancy.org/mendon-meadows

Ute Ladies’ Tresses, Utah Species, Fieldguide, Utah Division of Wildlife Resources, State of Utah, https://fieldguide.wildlife.utah.gov/?species=spiranthes%20diluvialis

Species Profile for Ute ladies’-tresses (Spiranthes diluvialis), US Fish & Wildlife Service, https://ecos.fws.gov/ecp/species/2159

Delmatier, Charmaine, Ute Lady’s Tresses (Spiranthes diluvialis), Plant of the Week, USDA Forest Service, 2016, US Department of Agriculture(USDA), https://www.fs.usda.gov/wildflowers/plant-of-the-week/spiranthes_diluvialis.shtml

St. John, Loren, Ogle, Dan, USDA NRCS, Ute Lady’s Tresses Spiranthes diluvialis Sheviak, Natural Resources Conservation Service, US Department of Agriculture(USDA), https://plants.usda.gov/DocumentLibrary/plantguide/pdf/pg_spdi6.pdf