Cascadia Wildlife Blog
News from the Wolverine Tracking Project and more
Winter is coming!
The winter Solstice is right around the corner, but with the storms and snow of the last week it certainly feels as though winter has already arrived here in the Pacific Northwest. Our winter wildlife surveys are in full swing, volunteers on our tracking and camera crews are busting out their snow shoes and puffy jackets and braving the elements to bring us some amazing wildlife findings!
This winter Cascadia Wild is partnering with ODFW to take part in the Western States Wolverine Occupancy Survey! This multi-state, multi-agency survey effort aims to determine the current distribution of wolverines in the western United States. Cascadia Wild is honored to be participating in this survey, the results of which will undoubtably have important implications for the future management and conservation of wolverines. Who knows, this could even be the year wolverines return to Oregon!
With the coming of winter, we expect to see some behavioral changes in many of the wildlife species found on Mount Hood. For example, deer tend to move to lower elevations in search of better foraging opportunities. Often times this results in the movement of larger predators that prey upon deer, such as coyotes and mountain lions, to lower elevations as well. In addition to the movement of deer and some predators, we also typically see less bears at our higher elevation sites, as they hunker down for a deep sleep over the winter. At lower elevations where the winter is not as extreme, bears can be active all winter.
We are excited to share the best of our winter camera and tracking surveys so far! Without further ado, let's get into it!
Perhaps our most unusual finding over the last month was this owl and deer interaction captured on one of our trail cameras!
An owl crouched on the forest floor is disturbed by a passing buck.
We don't often get trail camera footage of owls, and certainly not ones that are this clear. Trail cameras give us this amazing opportunity to peak into the lives of wildlife living in the forests nearby- we feel extra lucky to have witnessed this interspecies interaction!
We had a lot of other deer detections this month- at sites across the elevation gradient on Mount Hood. This will likely change as snow begins to accumulate at higher elevations! In addition to the changes in deer distribution during the winter months, deers diet will also change. In the summer deer mainly subsist on grasses and forbs (herbaceous flowering plants) but in the winter will begin to rely more heavily on woody plants.
From the top: A young deer with small budding antlers looks into the camera;Three deer are seen foraging in an open meadow; a buck with a large rack pauses in the middle of the camera site.
We also had a few detections of elk this month. Elk cows and calves move together in large herds through the winter, while bulls are more likely to strike out on their own after the breeding season.
An elk herd comes barreling through a camera site!
Elk belong to the same family as deer (Cervidae), they are both hoofed, ruminant mammals. Ruminants are hoofed herbivores that have four compartments in their stomachs! In one of these compartments -the rumen- plant material is fermented by symbiotic microbes. Plant cell walls are made up of cellulose, which can't be digested without the assistance of these little gut microbes! After being processed in the rumen and reticulum, food is regurgitated as cud and then re-digested. This time it will pass through all 4 compartments and be excreted as poop! Speaking of elk poop *ahem* scat, as those of us in the tracking field like to call it- check out this picture of elk scat our trackers found on a recent survey!
Scat found on a recent tracking survey, likely from an elk.
A recent tracking survey also found what is likely coyote scat!
Coyotes are opportunistic omnivores- they will eat berries, fungi, insects, fish, small mammals and fawns, depending on what is available. Our trackers weren't able to find the plant that produced these berries in the field but did some serious sleuthing back at home and determined that they likely belonged to the Arctostaphylos genus.
We also had several coyote detections on our trail cameras over the past month!
From the top: Two curious coyotes sniff around a baited log at night; a coyote checks out a camera site; a coyote gives a bait box on a tree a quick sniff.
Coyotes weren't the only large carnivores we spotted in the forest this month. We also had bobcat and bear detections at several sites.
Bobcats consume mostly small mammals such a snowshoe hare, rabbits and squirrels. Their diet remains fairly consistent throughout the year.
A bobcat on the prowl!
Black bears, the only bear found in Oregon, are considered to be the "least carnivorous" of the large carnivores. Black bears eat berries, fruit, herbaceous vegetation, insects and occasionally fawns or carrion. Black bears typically gorge themselves during the fall (eating up to 20,000 calories a day!) and then live off their fat reserves during their winter dormancy.
From the top: A black bear gets groovy rubbing up against a tree; A black bear stares into the camera; Two bears, a mama and her cub, come padding through the forest.
The smallest of the carnivores we spotted this month was this little weasel!
A weasel bounds through a camera site.
We have both short tailed and long tailed weasels in Oregon. Both are carnivorous, but short-tailed weasels dine primarily on mouse-sized prey, while long tailed weasels hunt slightly larger prey, such as ground squirrels or mountain beavers.
Speaking of squirrels! We saw lots of squirrels at our camera sites this past month. Ground squirrels are most likely snuggled up enjoying a cozy hibernation by now. However we saw plenty of Western gray squirrels, Douglas squirrels and even some Northern flying squirrels, all of which will remain active throughout the winter.
From the top: A Western gray squirrel sniffing at a bait log; A Douglas squirrel carrying a big cone; A Northern flying squirrel scampering across the forest floor.
One of our camera crews also spotted some beautiful squirrel tracks in the snow!
Squirrel tracks in the snow.
That's all we have to share with you this month but we will be back in the new year with more wildlife findings! We wish all of you a joyous holiday season and a happy New Year!
The Wolverine Tracking Project Winter Wildlife Surveys have drawn to a close, and summer is just on the horizon. As we take a look back at findings and best photos from the season, we have a lot to celebrate! And, if you are so inclined, check out our official Wolverine Tracking Project annual research report here, for all the findings of the past year!
If you're a returning volunteer and would like to join the Wolf Team, contact us and let us know!
And now the review!
Wolverine Tracking Project Winter Findings
A snowy scenic image of Newton Creek submitted by a volunteer. A small creek divides two snowy banks, with a line of snow tipped trees and Mt. Hood in the background.
Volunteers retrieved beautiful trail camera images, took stellar pictures of tracks, kept their eyes peeled for scat, urine, and other sign, and supporters helped us meet our fundraising goal! All of these contributions allow us to continue building a robust narrative of the animals of Mt. Hood National Forest and allow us to keep documenting wildlife in a meaningful way. Whether you were part of a Camera Crew, a Tracker, or had wanted to join but weren't able to due to pandemic, or if instead you supported us from home: Thank you, thank you!
Camera Crews committed over 1000 hours to checking cameras and recording and uploading data! Trackers committed 137 hours and surveyed over 15 miles of transects, for a total of 181 tracks surveyed!
Happy Spring! While snow and cold will linger around the mountain for a bit, there is an undeniable warmth on the breeze. In the valleys, buds are bursting on trees, spring ephemerals are opening to greet the season, and we welcome all the new growth that this season brings!
At Cascadia Wild, we are celebrating the season with offerings of Spring Botany Classes and a new Tracking Challenge!
Our last tracking challenge was All About Squirrels, and here are the Tracking Challenge Winners!
Left to right (or top to bottom): Clearest Squirrel Tracks by Graham Hulbert (Tracking Leader); Most Unusual Squirrel Tracks by Alexis and Andrew (Camera Crew); Best Squirrel Sign by Sophie Dimont (WTP Intern).
Meanwhile, winter's not over yet for the Wolverine Tracking Project! Read on for our latest findings from our winter wildlife camera and tracking surveys.
wildlife Camera and Tracking surveys
We've had a couple detections - and a couple possible detections - of target species this month!
We are excited to share this camera footage of one target species, the Sierra Nevada red fox:
A Sierra Nevada red fox enters a snowy clearing to inspect a camera site.
We had two separate detections from this camera in the same night, a few hours apart. It is impossible to say whether this is the same individual without genetic evidence, but in both instances the fox in frame was cute and curious! If the sightings are of two separate individuals (of opposite sexes) we hope they are a pair. These images were taken during red fox mating season (January and February), and kits conceived during these winter months will be born between March and May.
A Tracking Leader also recently found some tracks that could possibly belong to a Sierra Nevada red fox:
Left to right (or top to bottom): A canine trail up a snowy hill on Mt. Hood; a canine track in deep snow is carefully measured.
The trail pattern and size of these tracks are right on for fox tracks. However, these characteristics could also indicate that these tracks were made by a coyote or domestic dog. Unfortunately, due to less than ideal snow quality, it is difficult to look for more differentiating characteristics. In an ideal tracking scenario we would look at the shape of the negative space between the toes and heel pad. In domestic dogs and coyotes, this negative space is shaped like an "X". In red foxes, this shape is an "H". This print is a double register - meaning the hind foot has stepped on top of the front print, obscuring the details of the front track. If we could clearly see the front track, we could also look at the shape of the heel pad. In coyotes and dogs, this shape is trapezoidal; on foxes, the heel pad is more "squished" looking and can show up looking more like a horizontal line.
For now, we'll have to log this track as "canine" - no matter how excited we might be about the possibility of detecting our most elusive montane fox!
This tracker also found some potential Sierra Nevada red fox scat on the same survey:
Small scat in the snow, with tape measure and a memo book for size reference.
This scat has a dramatic tapered end and is about as thick as your pinky finger, which are both good indicators for fox. However, like the tracks found nearby, the scat is also a little formless which could be due to age, diet, or even the snow. It's hard to know who this scat belongs to based on visual clues alone, but this sample was collected and genetic analysis can tell us for sure.
One of our long-time volunteers also sent us these canine tracks, which may belong to another target species, the gray wolf:
Left to right (or top to bottom): A trail of probable wolf prints leads off through the snow; a probable wolf print shown up close.
When considering canine tracks that may belong to a wolf, the most important consideration is size. Wolf tracks are larger than coyote tracks and much, much larger than foxes. They are also much larger than most domestic dogs, except for large breeds like Great Dane, Mastiff, and Rottweiler. And so, determining who these tracks belong to requires differentiating between large domestic dog tracks and wolf tracks.
Compared to domestic dog tracks, wolf tracks typically show a greater distance between the two outer toes (the interdigital space). The toes also point straight ahead instead of out, like they tend to do in dog tracks. Claws are long and pronounced, and thinner than in dog tracks. Wolf tracks also show a longer track with a proportionally smaller heel pad, and the track will show a downward angle in the direction the wolf is traveling, since they do not walk as flat footed as dogs do.
Like our possible fox tracks above, however, we don't have enough details to say for sure that these belong to a wolf and not a domestic dog. Details of the trail pattern and context would also be helpful to confirm an identification. Thus, we can only say that these are probable wolf tracks - but still an encouraging sighting nonetheless!
We also detected another target species - and this time we are sure of it! These photos below show the fierce mustelid, Pacific marten.
Left to right and top to bottom: Several detections show a Pacific marten approaching the bait tree in the center of a snowy camera site. It is unclear if these are the same or different individuals each time.
The photos above are from three separate detections of marten at this same site, where they have also been detected throughout the season. Like the Sierra Nevada red fox, we can't know for certain if this is the same individual without genetic data. Martens spend the winter roaming and hunting alone, and the territories of males will overlap with those of females, but males defend their territories against other males. So if these are separate individuals, they may be polygynous partners.
This magnificent mountain lion was also documented:
A mountain lion stands in a snowy clearing.
A rare detection in the mountains in winter, this is the third sighting of a mountain lion at this location this winter. The camera crew even found fresh mountain lion tracks at the site at each camera check! Oregon has a healthy population of about 6,000 mountain lions. Hunting regulations were instituted in 1961, after the population had been decimated to approximately 200 individuals, and thankfully they have since rebounded.
Another feline was also detected, the bobcat! The two white spots which visible on the back of their ears are thought to be false eyes which deter predators. Such distinctive markings (as well as the white underside of their tail) may also help trailing cubs follow their mother.
Top: A bobcat picks its way through the snowy camera site clearing. Bottom: A bobcat photographed mid-stride.
Bobcats have classic feline tracks, with toes that sit in a curve above the heel pad, allowing the space between the toes and heel pad to form a C shape. With a length of 2 1/2 inches, these tracks are too small to belong to a cougar but are just the size you would expect for a bobcat.
Left to right: A dainty trail of prints in several inches of snow left by a bobcat; a partially snow-obscured bobcat print photographed up close.
Coyotes were regular visitors by night and day, as they have been throughout the winter season.
Left to right/Top to bottom: A coyote sniffs around the bait sight clearing and then pauses in front of the trail camera; White Tip (a coyote noted previously at this camera site for her white-tipped tail) watches on as her companion urinates on the bait stump; a coyote rolls in bait on the forest floor; a coyote visiting at night-time stands on hind limbs to thoroughly investigate the bait box; a coyote digs in front of the bait tree while a cohort looks on with interest.
The camera sites also documented many, many deer, exemplifying a diversity of age and size found between deer and even within the same herd.
Left to right/Top to bottom: Deer of many sizes parade past the trail camera; a deer tentatively steps into a snowy clearing; a deer elegantly pauses with their forelimb raised; two deer dusted with snow walk by; a deer with head lowered enters a sun-dappled clearing.
Elk also roam the forest. They sometimes appear on our trail cameras solo, but they can appear in quite large herds, too - especially this time of year.
Left to right/Top to bottom: A bull elk shows their profile to the camera; a bull looks away from the camera; a group of elk stand in a cluster looking in different directions.
Although snowshoe hares are common sights on our trail cameras, their quantity does not diminish their quality.
A hare bounds around a camera site, looking out of frame and at the camera.
Snowshoe hares are an incredibly important prey species for many omnivores and carnivores, like two of our target species, Sierra Nevada red fox and gray wolf. In fact, they are such an integral part of the food chain that their population size can directly affect the population of predators in the area. But to catch a snowshoe hare, a hopeful carnivore must have keen eyes and quick paws. In winter, the coats of snowshoe hares often turn from brown to white, to help them blend into the snowy world around them. Also, snowshoe hares can cover up to 10 feet of distance in a single bound, and they can bound away from carnivores at a top speed of 27 miles per hour!
Other important prey species include the the California ground squirrel, western gray squirrel, and the Douglas squirrel.
Top to bottom: A California ground squirrel runs onto a log and then off a log; two western gray squirrels chase each other towards a stump; a Douglas squirrel runs across the snow.
California ground squirrels are known to hibernate during winter, but can emerge from their winter sleep as early as January, though some are not seen until March. Looks like this one in the first photo is an earlier riser! Western gray squirrels and Douglas squirrels are active all winter. In the second photo, we can see two gray squirrels chasing each other - either in a territorial or mating display.
We also detected striped skunks wandering by a couple of our cameras.
Top to bottom: a skunk walks away from the camera, a skunk walks parallel to the camera
We also detected a couple turkeys!
Two turkeys have a leisurely walk through a camera site.
We hope you are able to get out and enjoy a leisurely, spring stroll through the woods, too.
Thank you for checking out our blog, and be sure to check back in next month for more wildlife news!