Wild About Utah

October 5, 2015April 8, 2021

Swainson’s Hawks

Swainson's Hawk, (Buteo swainsoni), Photo Courtesy US FWS — Swainson’s Hawk, (Buteo swainsoni)
Photo Courtesy US FWS

Swainson’s Hawk, (Buteo swainsoni)
Photo Courtesy US FWS

The Wellsville Mountains of N. Utah are known for their steepness, spectacular beauty, and an extraordinary fall raptor migration. The perfect mix of thermal uplift on its west slopes funnels the birds along the east side of the Great Salt Lake to their southerly destinations. Many species- eagles, falcons, accipiter’s, and buteos grace its slopes. The migration occurs primarily from mid-August to mid-October. Last Saturday’s hawk watchers were treated to 300 plus birds consisting of 15 species.

There is one in particular that is known for its extraordinary abilities and unusual behaviors that I will dwell on, that being the Swainson’s hawk. Nearly the entire population of these amazing birds will navigate their way to Argentina, a distance not equaled by any other raptor.

This species was named after William Swainson, a British naturalist. It is also known as the grasshopper hawk or locust hawk, as it is very fond of locusts and grasshoppers and will voraciously eat these insects whenever they are available. They have the unusual behavior of congregating in large numbers in fields to attack their prey. I’ve counted over 100 birds occupying cut hay fields in a half mile distance.

Breeding Swainson’s hawks are opportunistic feeders that respond quickly to local concentrations of food and rely heavily upon small mammal, bird, and reptiles such as young ground squirrels, rabbits, pocket gophers, mice, small birds. Birds taken include Mallards, young Sage Grouse, American kestrel, and young short-eared owls. Reptiles include snakes such as racers, gophers, striped whipsnakes, and lizards. Amphibians include tiger salamanders and toads.

In Argentina, Swainson’s hawks feed on flocks of the migratory darner dragonfly, following the hordes of insects and feeding mostly on the wing. Local outbreaks of locusts may also be exploited. There is also some evidence that road-killed birds and animals are consumed both on the wintering grounds and on the breeding grounds. They commonly follow tractors during haying or ploughing, where rodents are exposed for the hawks to capture, or insects are uncovered after crop cutting.

Wildfires often attract foraging hawks, especially grass fires in their South American wintering range where they frequently wait around the edges of the fire, picking off insects and vertebrates including grouse, lizards, and snakes.

This weekend I will be on my way to our raptor observation peak high in the Wellsvilles hoping to see this amazing bird, along with a host of other raptors as they migrate to more favorable climes, but only one of the myriad species will make it all the way to Argentina!

This is Jack Greene reading for Wild About Utah.

Credits:

Pictures: Courtesy US FWS, San Andres NWR
Text: Jack Greene, Bridgerland Audubon Society

Additional Reading:

Animal Fact Sheet: Ringtail, Arizona-Sonora Desert Museum, https://www.desertmuseum.org/kids/oz/long-fact-sheets/Ringtail.php

Ringtail (Bassariscus astutus), Wildscreen Arkive, https://www.arkive.org/ringtail/bassariscus-astutus/

September 21, 2015January 5, 2024

Yellow-Bellied Marmot

If you have explored the mountains of Utah, you’ve inevitably heard the iconic high-pitched chirp associated with Utah’s Yellow-Bellied Marmot.

Sporting chubby cheeks, large front teeth, a reddish-brown tail that spins like a helicopter rotor when fleeing, a greyish-brown back, white patch of fur between the eyes, and a yellow-orange belly, these sun-loving, flower-chewing mammals exude a Buddhist-type nature, especially when compared to their frantic neighbors, the pika.

Yellow-bellied marmots belong to the mammalian order Rodentia, in the squirrel family Scirudae. This family includes all species of prairie dog, chipmunk, and the woodchuck. Marmots fall under the genus “marmota.” The scientific name of yellow-bellied marmots is “Marmota flaviventris.” Although the origin of the term marmota is not certain, one accepted interpretation stems from a similar Latin word meaning “mountain mouse.” Flaviventris means “yellow belly” in Latin.

There are 15 species of marmot worldwide, all in the northern hemisphere. Most live in mountainous areas such as the Alpine marmot found only in Europe, though some live in rough grasslands. Although commonly believed to be in the same genus, the prairie dog is not classified in the genus Marmota, but in the related genus Cynomys.

When alarmed, yellow-bellied marmots emit a shrill whistle which earned them the nickname “whistle pigs,” by early settlers. Sometimes they make a “chucking” sound, which could explain another nickname, “rock chuck.” Additional monikers for marmots include “whistlers”, “mountain marmots”, and “snow pigs.”

Yellow-bellied marmots live at average elevations of 6,000-13,000 feet throughout western North America. They are often found in highland meadows and steppes, and almost always near rocks. Burrows are usually constructed in areas with plentiful plants which comprise the marmot’s main diet: herbaceous grasses and forbs, flowers, legumes, grains, fruits, and insects. Marmots spend the summer months sunning on warm rocks and fattening up in preparation for winter hibernation which can last up to 8 months.Thus, they are especially plump in the fall, right before hibernation, and reach weights of around 8-11 pounds. They may also estivate in June in response to dry conditions and a lack of green vegetation, only to reappear later in the summer when food is once again plentiful.

The typical social structure of yellow-bellied marmots includes a single male with a range of one up to four females. Males are territorial and aggressively protect their harem from other male marmots and smaller predators such as the ermine. Other predators to the yellow-bellied marmot include coyotes, foxes, badgers, bears, and eagles. Females raise their annual offspring of 3-8 jointly with other females within the harem. Baby marmots or pups are born relatively undeveloped and require large amounts of care until they emerge from the nest three weeks later. Only about half of marmot pups survive and become yearlings. If they make it through the first year, marmots may live up to 15 years of age.

Given that they spend about 80% of their life in a borrow, 60% of which is in hibernation, consider yourself lucky the next time you encounter a chubby, sun-bathing, whistling marmot!

For Utah State University Extension Sustainability, this is Roslynn Brain.

Credits:
Images: Courtesy and copyright Roslynn Brain McCann, Photographer
Text: Roslynn Brain McCann, Utah State University Extension Sustainability
Additional Reading:

Yellow-bellied Marmot, Species, Division of Wildlife Resources, Utah Department of Natural Resources, https://fieldguide.wildlife.utah.gov/?species=marmota%20flaviventris

Marmot Burrow, UCLA, Daniel Blumstein, https://www.marmotburrow.ucla.edu/watching.html

Marmot, Rocky Mountain National Park, https://www.nps.gov/romo/learn/nature/marmot.htm

Yellow-bellied Marmot (Rockchuck), Deseret News, 14 Mar, 1998,
https://www.deseretnews.com/article/629775/Yellow-bellied-Marmot-Rockchuck.html

September 7, 2015January 24, 2021

Maguire Primrose – A True Utahn Species

Click to view Maguire Primrose, Photo Courtesy US FWS, Larry England, Photographer — Maguire Primrose
Photo Courtesy US FWS
Larry England, Photographer

Hi, I’m Ru Mahoney with Stokes Nature Center in Logan Canyon. Utah is home to several iconic species – as indelible to our state’s identity as the craggy mountain landscapes and red rock deserts we call home. Gnarled bristlecone pines stand like abstract architecture for multiple millennia. Elusive mountain lions roam our alpine meadows in the north, all the way to our red rock canyons in the south. And curious coyotes – as resourceful as our native and pioneer ancestors – are truly wily wayfarers, as adaptable to suburban environments as to open range. But however pervasive iconic species may be to perceptions about our state, there are lesser known residents that are the true Utahns – species found absolutely nowhere else in the world.

The word “endemic” refers to a plant or animal whose distribution is restricted to a specific region. Utah ranks 6th in the nation for endemic species, with 247 endemic plant species alone. One of these is Primula cusickiana maguirei, or Maguire Primrose. This unassuming reddish violet-blossomed wildflower, standing just 2-4 inches high, makes a living in the cracks and depressions of limestone and quartzite outcrops along a 10 mile corridor through Logan Canyon in northern Utah. And that’s it! You won’t find it anywhere else on the planet. Of that narrow home range, Maguire Primrose is further isolated into two distinct populations within the canyon. Subtle differences in spring temperatures between the canyon walls often lead to one population blooming before the other. And while some species of primrose can survive by occasionally self-pollinating, Maguire Primrose is entirely dependent upon pollinators like bees, moths and the occasional hummingbird for reproduction. Therefore the success of Maguire Primrose requires a precise balance between cool temperatures for development and blooming, warmer temperatures to encourage pollinator activity, and a sufficient number of compatible mates blooming at the right time in the right place. In addition to these natural challenges, the US Forest Service reports that Maguire Primrose is increasingly impacted by recreational rock climbers, who clear cracks and crevices to accommodate permanent anchors along popular routes. Stokes Nature Center, and our forest service partners in the Logan Canyon Children’s Forest, hope to increase community awareness about Maguire Primrose to recruit our fellow nature lovers, including rock climbers and other canyon visitors, to become informed stewards of this rare and vulnerable wildflower.

Wildflower enthusiasts can find Maguire Primrose blooming from mid-April to mid-May at elevations of 4,800 to 6,000 feet. Flowers are more prevalent on north-facing cliffs where moisture from spring snowmelt is abundant and cooler temperatures nurture bud development. Stokes Nature Center, in partnership with the Logan Canyon Children’s Forest, offers seasonal guided field tours where canyon visitors can learn more about natural and human threats to Maguire Primrose, and enjoy a chance to see a true Utahn species found nowhere else in the world.

For Wild About Utah and Stokes Nature Center, I’m Ru Mahoney.

Credits:
Images: Courtesy US FWS, Larry England, Photographer
Text: Ru Mahoney, Stokes Nature Center in Logan Canyon.

Additional Reading:

Natural History of Maguire Primrose, Primula cusickiana var. Maguirei (Primulaceae)
Jacob B. Davidson and Paul G. Wolf
Western North American Naturalist Nov 2011 : Vol. 71, Issue 3, pg(s) 327-337 doi: 10.3398/064.071.0301

Maguire Primrose Fact Sheet, US Fish & Wildlife Service(FWS), https://www.fws.gov/mountain-prairie/factsheets/MaguirePrimroseFactSheet.pdf

Maguire Primrose, Primula cusickiana maguirei, Utah Rare Plant Guide, Utah Native Plant Society, www.UtahRarePlants.org

August 31, 2015April 8, 2021

Ringtails

Ringtail (Bassariscus astutus), Photo Courtesy US FWS — Ringtail (Bassariscus astutus)
Photo Courtesy US FWS
San Andres NWR

I’ve long been intrigued by ringtail cats. I wasn’t quite sure where they fit in the grand scheme of things until I did some research while working in Zion N.P. where they were known to vandalize building contents and other mischievous behaviors.
These “mystery” cats are mostly nocturnal, highly secretive, very bright, and full of tricks and athletic feats that place them in an elite animal category. I was intent on seeing one but knew my chances were slight. On a midmorning hike into Hidden Canyon I was startled by something not far ahead of me scrambling up giant boulders. To my amazement, there they were- two ringtails hightailing in broad daylight- my first, and possibly last, sighting of these amazing animals!
The name “ringtail” comes from the seven or eight black rings on the animal’s tail. Although they are not related to cats, people have referred to them as miner’s cat, civet cat, and cacomistle (an Aztec Nahuatl term meaning half mountain lion). Along with raccoons and coatimundis, ringtails are members of the Procyonidae (raccoon) family. The scientific name, Bassariscus astusus, comes from bassar (fox), isc (little), and astut (cunning).

If one were to design an animal to climb along ledges and up vertical cliffs, the ringtail might be it. Their large tail provides balance for narrow ledges and limbs, even allowing them to reverse directions by doing a cartwheel. They can rotate their hind feet 180 degrees to quickly climb back down cliffs or trees as well as cacti. Furthermore, ringtails can ascend narrow passages by stemming (pressing all feet on one wall and their back against the other or pressing both right feet on one wall and both left feet on the other), and wider cracks or openings by ricocheting between the walls.

A ringtail’s total length ranges between inches with a tail length of 12 to 17 inches. They weigh two pounds or so. Vocalizations include squeaks, metallic chirps, whimpers, chitters, chucking, hisses, grunts, growls, and howls.
Like most omnivores, these hunters eat a wide variety of food. They have a seasonal diet, with plants and insects the favorite fall food, mammals and birds more common in winter, and insects dominate in summer. Preferred mammals include mice, woodrats, squirrels and rabbits. Ringtails also feed on nectar from agaves. Great horned owls are their major predator, along with coyotes, raccoons and bobcats.

Primarily nocturnal, ringtails don’t like daylight at a young age. Ringtails inhabit rough, rocky habitat, usually not too far from water, although they can subsist without free water if their diet consists of high protein prey or fruit and insects. In addition, they occur in semi-arid landscapes such as pinyon-juniper pygmy forests and oak woodlands. Ringtails den in tree hollows, rock crevices, other animals’ abandoned burrows or even abandoned buildings. Except in bad weather, they move frequently, rarely spending more than three straight nights in one den.

Mating occurs between February and May with one to four, hairless young born in May or June. Eyes open and fur covers their bodies by five to six weeks. They are weaned by fall and can mate near the end of their second year. Ringtails range across the southwestern USA and most of Mexico with outliers in northern California, Nebraska, Missouri and extreme southwest Wyoming.The genus Bassariscus consists of only one other species which lives in Central America. Because ringtails do not walk on the soles of their feet, unlike coatis or raccoons, they are sometimes placed in their own family, Bassariscidae. The ringtail became the State Mammal 1986.

For Wild About Utah, this is Jack Greene.

Credits:

Pictures: Courtesy US FWS, San Andres NWR
Text: Jack Greene, Bridgerland Audubon Society

Additional Reading:

Animal Fact Sheet: Ringtail, Arizona-Sonora Desert Museum, https://www.desertmuseum.org/kids/oz/long-fact-sheets/Ringtail.php

Ringtail (Bassariscus astutus), Wildscreen Arkive, https://www.arkive.org/ringtail/bassariscus-astutus/