The natural environment and history of Kalispell’s West Valley area
by Skip Via
skip@westvalleynaturalists.org
Editor’s note: More details on what constitutes hoar frost, rime frost, and rime ice may be found in this article on our web site: Hoar Frost or Rime Ice, or Something else?
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On December 30 and 31, 2025, the conditions in the West Valley were perfect for creating rime frost: low, dense fog, cold temperatures, and steady winds.
by Skip Via
skip@westvalleynaturalists.org
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If you were in the West Valley area during the middle of the afternoon of December 9, 2025 and happened to be looking through The Notch toward GNP , you may have seen a rare and typically brief atmospheric phenomenon–a Kelvin-Helmholtz cloud system forming.
by Jeanine Buettner
nammy@montanasky.com
Arthur Milton Hodgson (1859 – 1931) was born in Livingston County, Illinois on August 30, 1859 to Zimri and Martha Hodgson, who were successful farmers. Zimri Hodgson was a well-known breeder and raiser of pure-bred livestock. Arthur Hodgson was raised on the family farm and received his education in the local schools. For many years he remained associated with his father in business but finally engaged in farming and stock raising at Forrest, Illinois and later at Healey, Illinois. From boyhood on he had always been interested in the breeding of livestock, particularly the improvement of the breed and the maintenance of as high a standard as possible.  Arthur arrived in Montana in 1904 and immediately came to the Flathead Valley, where he was successful in his chosen vocation. Â
Continue Reading →by Pat Jaquith
pat@westvalleynaturalists.org
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Spiders can be called creatures of one summer that hatch or emerge from diapause as the weather warms and reach maturity in late summer. These predatory insects employ various means to capture their prey.
Read more: Some Spiders in West Valley
The large Banded garden Spider lays in wait at the edge of the web; when it senses an insect in their web, it attacks with a bite that stuns the prey and liquifies their inner parts. It encases the stunned insect cocoon-like before devouring the liquid nutrients.
All of the above Orb weavers catch their prey in a trap they spin.
Funnel-web Spider Clear-wing Grasshopper in funnel web
The Funnel-web spider spins a sheet-like web shaped like a funnel on the ground. The spider usually lies in wait at the end of the tube; when an insect becomes entangled, it pulls the prey down into the ground where it devours it.
Crab spiders, sometimes called ambush bugs, lie on a flower in wait for an insect to visit the plant. When the visitor becomes engrossed in its work, the Crab spider dashes in and paralyzes the insect with venom in its bite.
Goldenrod Crab spiders are able to change color to match the flower it chooses. It takes a few hours after it arrives at the flower where it will spend time in wait. Most of the Goldenrod Crab spiders I have seen were colored like the one on the Spotted Knapweed, regardless the color of the flower.
The Cat-faced spider at right was gone the next time we checked this web site under a window sill. In its place was an egg sac. These spiders die after laying their eggs, just before a hard frost. The eggs will hatch in spring and live to predate on other insects around the house.
This Fierce Orbweaver (identified with help of iNaturalist), was climbing up the door to my house. Not recognizing it, nor wanting to invite it inside, I very cautiously lured it away with a stiff plant stem. If I got too close, it reared back and waved its front legs as if boxing. While it moved across the driveway, it left a string of silk from the hole visible in the right photo; it seemed to use it as an anchor to help flip onto its back. The Fierce Orbweaver is listed as a native species in Montana.
Wolf Spider with spiderlings on her back
Female Wolf Spiders carry their egg sac on their back; when they hatch, the babies ride there. They will fall off in leaf litter where they go into diapause until spring. This spider was crossing a sun-warmed driveway in early evening in September.
Nest of spiderlings on May 23. While I watched, the babies would crawl up a blade of grass and float off on a spinneret in the wind. I did not wait long; only a few had dispersed over the nearby wetland.
by Skip Via
skip@westvalleynaturalists.org
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In northwest Montana, wild huckleberries rule the berry world. (Never mind that what we call huckleberries are not actually huckleberries at all, but rather a species of blueberry. I realize I could be shot for saying this.) But lately, another berry–this one cultivated–has been making its appearance in the West Valley area–honeyberries.
by Skip Via
skip@westvalleynaturalists.org
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We have several beds of bee balm (bergamot), both native varieties and cultivars, planted around our property to attract bees and hummingbirds, which it does in huge numbers. It’s not uncommon find more than a dozen species of bees foraging for nectar on a single bed.
Lately, I’ve noticed a virtual invasion of a bee species that is new to me–a small, gray striped bee that looks like a cross between a honey bee and a bumblebee. True to form, it’s neither. It turns out that this is an urbane digger bee (Anthrophora urbana).
by Skip Via
skip@westvalleynaturalists.org
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Editor’s note: This article has been updated to include some information and images from Pat Jaquith,
Ghost pipe, which is known by many other names including ghost flower, corpse plant, and Indian pipe, may be found in the West Valley area. If you do run across any, please take a few photos and then leave it alone, for reasons that will be explained below.
by Skip Via
skip@westvalleynaturalists.org
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It’s always fun to run across a species that you have never encountered before, and that was the case for me today when I observed this Western Sheep Moth while I walking the trails in Happy Valley.
Western Sheep Moths are native to the western US. Their main range is southern California and the Sierra Nevada mountains, and while they are not common here in the valley, there are several reports on iNaturalist of encounters with them in our area.
Unlike many moth species, Western Sheep Moths are daytime flyers, and rather large as local moths go–a bit smaller than a Luna Moth with an average wingspan of roughly three inches. Their identifying characteristics include pink, orange and yellow wing spots, black and yellow striped abdomen, prominent feathery antennae, and a tuft of bright yellow fur across the top of the thorax.
Western Sheep Moths lay their eggs in the summer months on roses (Rosaceae), both wild and cultivated. Their caterpillars (larvae) feed on them. They are also known to feed on buckthorns, an invasive species here in Montana. While they are not important pollinators, they are known to inadvertantly serve this function.
Why are they called Sheep Moths? It turns out that they can be pests for sheep farmers, as adults will feed on the wool of domesticated sheep, degrading the quality and quantity of the wool. Sheep moths can cause a 15% drop in the quantity of wool produced by a flock.They are also known to invade homes and feast on wool and other clothing. They are prey for many birds species, and they are known to eat some insects.
Have you encountered a sheep moth in your wanderings? Do you see them as pests? Part of the ecosystem? Let me know in the comments.
by Pat Jaquith
pat@westvalleynaturalists.org
Common Buckthorn aka Rhamnus cathartica hides in plain sight. If you have walked in Lawrence Park or Owen Sowerwine in Kalispell or in many other areas along the local wetlands, you may have noticed the overwhelming prevalence of some shrub/trees that have thorns and lots of black fruits a little smaller than Chokecherries. The State of Montana recognizes this tree, native to Eurasia, as a Noxious Weed. It was introduced many years ago as an ornamental at a time when few people realized that many plants can be well-behaved in their native land because there are natural controls – insects or mammals that eat them and keep them in check or weather that checks their growth. However, in our country, none of those natural predators exist, and given time, the plant flourished to the extent that native plants are choked out. Cathartica refers to the fact that the plant (fruit) causes diarrhea. Birds are attracted to the fruits that ripen in late fall and persist throughout the winter. However, the birds gain no nutrition because of the catharsis it causes.
Bright yellow-green leaves haven’t dropped. When all the other deciduous trees have lost their leaves, this characteristic makes Common Buckthorn easy to identify.
Saplings no taller than 4′ and .5″ in diameter may have drupes. The tree above must be quite old.
If you have questions about identifying or controlling Noxious weeds, contact
Your local Extension Service
Your local weed control district
Montana Department of Agriculture
by Skip Via
skip@westvalleynaturalists.org
Editor’s note: This article is a followup to this article from August 2024. The many uses of hemp are discussed in detail in that article.
If you have driven down West Valley Drive north of West Reserve this spring, you have probably noticed the large number of hemp bales in the fields on either side of the road near the intersection with Coclet.. There are only two hemp growers in the valley and this operation of about 400 acres total between the two fields is one of them.
by Pat Jaquith
pat@westvalleynaturalists.org
Editor’s Note: The smaller images on this page my be enlarged by clicking on them.
Part I focuses on some of the local birds that raise their offspring in cavities, that is, holes in trees, man-made house-like structures, and holes in earthen areas. Part II will cover some of the birds I have discovered raising their young in more exposed locations. I marvel at their ability to overcome the challenges that weather, predators, and life with dependents without physical barriers must present.
A Western Wood-Pewee fashioned a nest of grass, rootlets and bits of other natural material on a lichen-covered limb of a Douglas fir tree. There are many needle-laden branches overhead that provide shade and divert rain drops. When she returns to the nest, she always lands on a different branch and little by little approaches the nest site as if she doesn’t want to reveal the location to others. I had the unique opportunity to observe all of this in reverse. I was in the area to visit a plant I was studying. As I cast my gaze around the location so I could note landmarks to help me return, I noted “something looks different about this branch.” Indeed, the lump overhead looked like a little nest! At first, I wondered if the nest had overwintered. It was a few feet higher than I could reach, so I only could observe, not touch. As I continued to look up, movement caught my attention: it was the owner of the nest, intent on getting to the empty nest. I froze in place and before I could blink, the bird arrived. I paused just close enough to get a couple of pictures before abandoning the area. I returned several times that summer to monitor the plant;
I’d look to see if the bird was on the nest before getting close, but finding the well-camouflaged nest was never easy.
by Pat Jaquith
pat@westvalleynaturalists.org
Editor’s Note: The smaller images on this page may be enlarged by clicking on them.
Beautiful West Valley is the chosen home of many species of birds thanks to the varied agricultural uses, ponds and wetlands, and forested areas. Locating an appropriate homesite and constructing a new nest every year must be a daunting task for animals with a beak and two wings as principal tools! Observing birds making nests and raising their families every spring is a delightful time of discovery for me. In the following pages, I will share some of the avian nesting activities I have been fortunate to observe in our area.
CAVITY NESTERS
4.24.24
Continue Reading →by Pat Jaquith
pat@westvalleynaturalists.org
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Like a bird incubating eggs, Bunchgrass growing on sunny hilltops protects and warms the ground for many ephemerals like Ranunculus glaberrimus.
Lithophragma parviflora (Little Woodland Star) and Antennaria dimorpha (Cushion Pussytoes) often appear very early in sheltered areas warmed by west-facing stony outcrops. Tachinid flies are early-appearing pollinators of these flowers.
Dodecatheon conjugens (Shooting Star) and Lomatium triternatum (Nine-leaf Desert Parsley grow in an old pasture where grass will be two feet tall in another month.
Balsamorhiza sagittata (Arrowleaf Balsamroot) Ranunculus glaberrimus (Early Buttercup) and Erythronium grandiflorum (Glacier Lily) are so precocious that sometimes they get covered with snow while in full flower and recover as if they had welcomed the extra gift of water.
Oops! One of those surprises you can get while looking at the ground in search of early flowers! Recently emerged from hibernation, this garter snake was coiled around the stems of a young Serviceberry shrub in a sunny patch of soon-to-open Early Buttercups!
Cladonia pleurota (Red fruit Pixie cup lichen) Claytonia lanceolata (Spring Beauty)
Carex concinnoides (Northwestern Sedge) and a wonderful discovery of the first appearance of a Calypso bulbosa(Fairy slipper orchid) plant, a little plant that will blossom in May!
by Pat Jaquith
pat@westvalleynaturalists.org
There’s a bite of cold in that wind and snow on the mountains. Back roads slip from ice to mud in a single step. Winter visitors wing over snow-bent grasses as if to say “Farewell!” and Pintails fill the open water still enclosed by ice. FOY (First-of-the-Year) birds, flowers, songs meet with excitement. In sheltered places, the sun warms the ground and our faces. Let’s check it out!
Continue Reading →by Jeanine Buetttner
nammy@montanasky.com
The following is the text of an interview with Mabel Grosswiler (Mrs. Carl Grosswiler) published in the Daily Inter Lake in November, 1949.
In 1875 an immigrant boy from Switzerland landed in New York to join his brother. Their father had accidentally drowned when they were very young, and the widowed mother never saw her boys again after they came to America. Frank Xavier Grosswiler was just 18 years old when he came to America.
