A Northwoods Almanac for 12/5-18/2025
Snowy Owls!
According to the DNR, “The first snowy owls of 2025 reached Wisconsin on Nov. 6. While early November is a typical arrival date, the total of 17 owls reported as of Nov. 17 is above average for this early in the season. The last year with a higher total at this time was 2017, when 58 were already tallied and a large irruption unfolded. Could this be another irruption year? It’s possible, and we should know better by early-mid December.”
As is typical, the bulk of this year’s owls have been spotted near the shores of Lakes Michigan and Superior. Snowies nest in open tundra, so wide open spaces are where they know to hunt, and that’s where we most often see them in Wisconsin. Harbors from Ashland and Oconto to Kewaunee, Sheboygan, and Milwaukee provide ample prey like ducks and gulls, while grasslands, farm fields, airports, and other open habitats offer rodents, squirrels, and rabbits.
In the Lakeland area, you can try the shorelines of open large bodies of water or airports to see a snowy, but the truth of the matter is our forested landscape is poor habitat for these owls. The best place in the North County to see a snowy is usually Chequamegon Bay in Ashland.
Get the full update at https://dnr.wisconsin.gov/topic/WildlifeHabitat/SnowyOwls
Natural History Books for Christmas
Recommended recent books to give nature lovers for Christmas? Try the following:
Is a River Alive? – Robert Macfarlane
The Best American Science and Nature Writing 2025 – Susan Orlean
The Serviceberry – Robing Wall Kimmerer
How Can I Help? Saving Nature with Your Yard – Douglas Tallamy
The Light Eaters: How the Unseen World of Plant Intelligence Offers a New Understanding of Life on Earth – Zoe Schlanger
How to Love a Forest: The Bittersweet Work of Tending a Changing World – Ethan Tapper
And favorites from local environmental authors:
Ripple Effect: How We’re Loving Our Lakes to Death; Lakeside Companion; On the Pond – Ted Rulseh
Beneath the Eagle Tree – Bob Kovar
Seasons of the North; White Deer: Ghosts of the Forest; Pure Superior – Jeff Richter
Wrong Tree: Adventures in Wildlife Biology – Jeff Wilson
From Barbells to Spruce Grouse – Joe Hovel
I’ve written a few, too: See www.manitowishriverpress.com
Hawk Ridge Totals
Hawk Ridge Bird Observatory in Duluth is regarded as one of the finest sites for counting migrating raptors in the U.S., but the counters also tally songbirds as they fly over the ridge. The count runs from 8/1 through 11/30, but here are a few of the totals through 11/27:
Total number of birds counted – 309,347
Highest monthly total was September – 194,480
Number one most abundant bird – Blue jay – 72,277
Number two – American robin – 32,387
Number three – Common nighthawk – 18,352
Number four – Sharp-shinned hawk – 15,683
Number five – Yellow-rumped warbler – 11,510
Broad-winged hawks were surprisingly few this autumn – just 8,799. The record high was in 2003 when 160,703 were counted. Does this mean broad-wingeds are way down in number, or was this just a poor year to view them over the ridge? Well, that’s why we do long-term data collecting. We’ll see if future years also show a downturn.
Of note was the record count for eagles. Golden eagles tallied 252, eclipsing the previous record of 223. And bald eagles totaled 6,108, barely surpassing the previous record of 6,099.
Finally, the biggest surprise for most people – 59,331 common green darner dragonflies migrated over the ridge! And an estimated 57,000 of those occurred on one day alone – September 1.
Most folks don’t even know some species of dragonflies migrate, but common green darners do, and they migrate in a manner that echoes monarch butterflies. Researchers in 2019 discovered that at least three generations make up the annual migration of common green darner dragonflies. The first generation emerges in the southern United States, Mexico and the Caribbean starting around February and then flies north. Once in the North, those darners lay eggs and die, giving rise to a second generation that migrates south until late October. A third generation, hatched in the south in the fall, overwinters there before laying eggs that will hatch in February and start the entire process over again in the spring.
Your trivia fact for the week: Researchers in Vermont have found that the common green darner spring migration closely follows the average daily temperature of 48°F northward.
Looking for Good News? Bats Are Rebounding!
The fungal disease white-nose syndrome hit Wisconsin cave-dwelling bats hard beginning in 2014, causing nearly 100% losses in many populations across the U.S. and Canada as well as in Wisconsin. Our four species of cave-dwelling bats (Wisconsin boasts eight species of bats) - big brown bat, little brown bat, northern long-eared bat and tricolored bat – were profoundly impacted, raising alarm that they could be extirpated entirely from the state. However, recent Wisconsin Bat Program survey counts show rebounding numbers of little brown bats in particular at some significant roost and hibernation sites across the state.
This summer, DNR scientists and volunteers with the Great Wisconsin Bat Count tallied nearly 25,000 bats as they emerged from their daytime roosts, up from 22,600 in 2024, the third consecutive annual increase for the species in Wisconsin.
This doesn’t mean all our bats are out of the woods. Hibernating bats are still stressed by white-nose syndrome each winter, and tricolored bats and northern long-eared bats in Wisconsin have not shown signs of recovery similar to the little brown bats.
Since bats are major consumers of agricultural and forest pests, and predators of biting insects, we want as many as possible around. Three years of increasing numbers offers a strong reason for hope. See https://dnr.wisconsin.gov/topic/WildlifeHabitat/Bats for more info.
Snow and More Snow!
The last two winters offered marginal snowfall in the Lakeland area, but the blizzard that hit us on 11/26 appears to have rectified that omission. We measured 20 inches on our property on Thanksgiving day, 11/27, and it was still snowing!
For wildlife, of course, there are winners and losers after a big snow event. Deer are both winners and losers. Winners because trees are bent down low enough for them to browse buds they would never otherwise reach. Losers because deep snow limits their ease of movement, while snow over 18” may force deer into “yards” to conserve energy that would otherwise be lost plowing through such heavy snow.
Rodents are very happy this week. They now have deep insulating snow that also acts as a cover from predators. Called the “subnivean” zone, this area at the junction of the ground and the snow is relatively warm and safe, at least compared to living on the surface.
For birds, deep snow makes for more losing than winning. Birds need to find seeds, fruits, and/or insect eggs/larvae/pupae during the winter – lots of them – and snow covers them all up. The only advantage I’m aware of is for grouse and redpolls who are both known to plunge into deep snow to conserve heat during periods of prolonged severe cold.
Think about every species that overwinters here. Each will have a different story of how they interact with blizzard conditions and the resulting deep snow, and all will be challenging stories.
The Limberness of Conifers
After 21+ inches of snow had fallen over Thanksgiving, the branches of the conifers on our property – the balsam firs, white spruces, white pines, and white cedars – all hung like collapsed umbrellas, all sheathed in white and bearing immense weight. This capacity of conifer branches to bend and bend without snapping, and then to spring back up as the snow slides off like nothing happened, illustrates why the far northern forests, the boreal forests of North America, are dominated by conifers.
The suppleness of the branches are one reason conifers can live in heavy snowscapes. The other is the shape of most conifers, in particular the pyramidal or conical shape of balsam fir and white spruce, the dominant trees in the boreal forest. The branches below support the branches above, all cooperating, or bowing if you will, to bear the enormous snow loads until the snow sheds off.
In one study in Finland after a particularly snowy winter, researchers calculated the total weight of snow accumulation on Norway spruces. A 60’ tall tree at an elevation 1,150’ was burdened by an astonishing 7,253 pounds of snow, but like Atlas, bore it gracefully.
Underneath those branches that droop all the way to the ground may hide snowshoe hares or any other animal or bird looking for a spot out of the wind and out of a predator’s eye.
Celestial Events
The full moon was officially last night, 12/4, but it’s still 98% illuminated tonight, 12/5. It’s the highest full moon of the year – 56° higher than June’s full moon.
This year’s earliest sunsets begin tonight and last through 12/14. The sun will set at 4:14, 3 hours and 39 minutes earlier than the week around summer solstice.
Look during the evening of 12/13 into the predawn of 12/14 for the peak Geminid Meteor Shower. The Geminids are usually the strongest meteor shower of the year and are often bright and intensely colored. This is the one major shower that provides good activity prior to midnight.
Thought for the Week
“’Shifting baseline syndrome’ is the name given to the process whereby ongoing damage to the natural world becomes normalized over time, as each new generation measures loss against an already degraded benchmark . . . The same effect is also sometimes known as ‘generational amnesia’, and it is a powerful force in terms of disguising and enabling further ecological harm.” – Robert Macfarlane