Dr. Jeffrey Kavanaugh 🇨🇦
@jlkavanaugh.bsky.social
Glaciologist and Earth system scientist at the University of Alberta. Luthier, photographer, baker, and coffee maker. Two-wheeled travel enthusiast and dog companion. He/him.
Pancake ice drifts down the North Saskatchewan River in the last moments before dawn.
November 19, 2025 at 3:34 PM
Pancake ice drifts down the North Saskatchewan River in the last moments before dawn.
Here's one of my two F cameras - I just love 'em. For standard lenses, it's hard to go wrong with either the Nikkor-S 50mm f/1.4 or the Nikkor-H 50mm f/2.0
November 18, 2025 at 6:27 PM
Here's one of my two F cameras - I just love 'em. For standard lenses, it's hard to go wrong with either the Nikkor-S 50mm f/1.4 or the Nikkor-H 50mm f/2.0
Hmm, that would be a bit concerning.
Here are the results from CWD testing during 2023 (left; 708 positive cases) and 2024 (right; 472 positive cases).
Not encouraging, and the westward spread is visible even over just the one year.
Here are the results from CWD testing during 2023 (left; 708 positive cases) and 2024 (right; 472 positive cases).
Not encouraging, and the westward spread is visible even over just the one year.
November 18, 2025 at 4:16 AM
Hmm, that would be a bit concerning.
Here are the results from CWD testing during 2023 (left; 708 positive cases) and 2024 (right; 472 positive cases).
Not encouraging, and the westward spread is visible even over just the one year.
Here are the results from CWD testing during 2023 (left; 708 positive cases) and 2024 (right; 472 positive cases).
Not encouraging, and the westward spread is visible even over just the one year.
…and how it ended.
November 16, 2025 at 9:48 PM
…and how it ended.
How today started vs. how it proceeded.
November 15, 2025 at 12:10 AM
How today started vs. how it proceeded.
Just before the end of legal light this evening, two does wandered into view at ~200 yards. I was hoping that a buck was shadowing them, but if one was I didn’t see him.
This is what one of those does looked like in the tall grass - which explains rather well why I don’t have a full freezer.
This is what one of those does looked like in the tall grass - which explains rather well why I don’t have a full freezer.
November 13, 2025 at 3:51 AM
Just before the end of legal light this evening, two does wandered into view at ~200 yards. I was hoping that a buck was shadowing them, but if one was I didn’t see him.
This is what one of those does looked like in the tall grass - which explains rather well why I don’t have a full freezer.
This is what one of those does looked like in the tall grass - which explains rather well why I don’t have a full freezer.
I can think of far worse ways to spend the past two evenings than enjoying this view from a hunting blind, watching for whitetail bucks.
November 13, 2025 at 3:11 AM
I can think of far worse ways to spend the past two evenings than enjoying this view from a hunting blind, watching for whitetail bucks.
Obligatory crumb shot.
That’ll do nicely, thank you very much.
That’ll do nicely, thank you very much.
November 9, 2025 at 7:50 PM
Obligatory crumb shot.
That’ll do nicely, thank you very much.
That’ll do nicely, thank you very much.
Here’s what the second boule’s singing sounds like:
November 9, 2025 at 7:36 PM
Here’s what the second boule’s singing sounds like:
With Fall comes the beginning of sourdough bread season. Here’s the first boule, fresh out of the oven.
November 9, 2025 at 6:10 PM
With Fall comes the beginning of sourdough bread season. Here’s the first boule, fresh out of the oven.
Is a fatbike overkill for the 1-2 cm of snow we’ve received thus far today?
Of course it is.
Do I care?
Of course not.
Of course it is.
Do I care?
Of course not.
November 7, 2025 at 4:17 PM
Is a fatbike overkill for the 1-2 cm of snow we’ve received thus far today?
Of course it is.
Do I care?
Of course not.
Of course it is.
Do I care?
Of course not.
Yea, it really was. It was surprisingly good off-road, too - early Transporters had more ground clearance than one would expect, given the reduction gear in the rear drive hubs (which moved the half-axles to the top of the hubs).
November 6, 2025 at 1:08 AM
Yea, it really was. It was surprisingly good off-road, too - early Transporters had more ground clearance than one would expect, given the reduction gear in the rear drive hubs (which moved the half-axles to the top of the hubs).
Well, colour me bummed.
After re-commissioning my fatbike for winter duty, I went for a quick test ride - and came across one of our neighbourhood merlins (Falco columbarius), dead in the back alley.
Rest in peace, you dear little murderbird.
After re-commissioning my fatbike for winter duty, I went for a quick test ride - and came across one of our neighbourhood merlins (Falco columbarius), dead in the back alley.
Rest in peace, you dear little murderbird.
November 6, 2025 at 12:14 AM
Well, colour me bummed.
After re-commissioning my fatbike for winter duty, I went for a quick test ride - and came across one of our neighbourhood merlins (Falco columbarius), dead in the back alley.
Rest in peace, you dear little murderbird.
After re-commissioning my fatbike for winter duty, I went for a quick test ride - and came across one of our neighbourhood merlins (Falco columbarius), dead in the back alley.
Rest in peace, you dear little murderbird.
The only genuinely dumb design element is that the double side doors opened front first, then rear.
Given that the sink/icebox unit makes it impossible to enter/exit by opening just the front door, you had to open+close both doors, every time. Which was perpetually annoying, esp. in bad weather.
Given that the sink/icebox unit makes it impossible to enter/exit by opening just the front door, you had to open+close both doors, every time. Which was perpetually annoying, esp. in bad weather.
November 5, 2025 at 9:43 PM
The only genuinely dumb design element is that the double side doors opened front first, then rear.
Given that the sink/icebox unit makes it impossible to enter/exit by opening just the front door, you had to open+close both doors, every time. Which was perpetually annoying, esp. in bad weather.
Given that the sink/icebox unit makes it impossible to enter/exit by opening just the front door, you had to open+close both doors, every time. Which was perpetually annoying, esp. in bad weather.
With snow forecasted - at long last! - to arrive later today, I suspect that my fatbike will take over commuting duties tomorrow morning.
November 5, 2025 at 4:53 PM
With snow forecasted - at long last! - to arrive later today, I suspect that my fatbike will take over commuting duties tomorrow morning.
On that topic:
November 4, 2025 at 4:34 AM
On that topic:
I walked to work today, carrying my 1952 Leica iiif camera, to which I screwed a recently-acquired 5cm 1:2 Summitar lens.
I'll likely send the lens off for a CLA soon (as there's a slight haze that I hope can be removed), and wanted to get a few 'before' shots.
I'll likely send the lens off for a CLA soon (as there's a slight haze that I hope can be removed), and wanted to get a few 'before' shots.
November 3, 2025 at 5:27 PM
I walked to work today, carrying my 1952 Leica iiif camera, to which I screwed a recently-acquired 5cm 1:2 Summitar lens.
I'll likely send the lens off for a CLA soon (as there's a slight haze that I hope can be removed), and wanted to get a few 'before' shots.
I'll likely send the lens off for a CLA soon (as there's a slight haze that I hope can be removed), and wanted to get a few 'before' shots.
Cinnamon buns, fresh from the oven!
November 2, 2025 at 10:53 PM
Cinnamon buns, fresh from the oven!
Yes, exactly - it’s a heavy canvas chest protector, which he started wearing after needing some stitches from encountering some cast-off barbed wire.
He considers it his “fun vest” - whenever it comes out, he knows we’re going somewhere fun.
He considers it his “fun vest” - whenever it comes out, he knows we’re going somewhere fun.
October 29, 2025 at 12:45 PM
Yes, exactly - it’s a heavy canvas chest protector, which he started wearing after needing some stitches from encountering some cast-off barbed wire.
He considers it his “fun vest” - whenever it comes out, he knows we’re going somewhere fun.
He considers it his “fun vest” - whenever it comes out, he knows we’re going somewhere fun.
This is an old picture, from one of Logan’s first hunts. It was on this trip that everything clicked for him, and he came to realize what he was meant to do. I still remember watching that realization unfold, in real time.
October 29, 2025 at 5:14 AM
This is an old picture, from one of Logan’s first hunts. It was on this trip that everything clicked for him, and he came to realize what he was meant to do. I still remember watching that realization unfold, in real time.
There are few things in life finer than an evening spent with Logan, doing the very thing for which he was bred (and that certainly gives him the most joy).
I'm not sure how many more such evenings we'll share, given his worsening arthritis. But damn do I appreciate each and every one of them.
I'm not sure how many more such evenings we'll share, given his worsening arthritis. But damn do I appreciate each and every one of them.
October 29, 2025 at 4:23 AM
There are few things in life finer than an evening spent with Logan, doing the very thing for which he was bred (and that certainly gives him the most joy).
I'm not sure how many more such evenings we'll share, given his worsening arthritis. But damn do I appreciate each and every one of them.
I'm not sure how many more such evenings we'll share, given his worsening arthritis. But damn do I appreciate each and every one of them.
![Simple Nesting Box Plan for the
Northern Flying Squirrel
(Glaucomys sabrinus)
1. Ensure access hole size is no
larger than specified. You may wish to
install a sheet metal occluder around
entrance to prevent hole enlargement
by unwanted species. No sharp edges!
2. Run a bead of water-based siliconized
caulking along length of top where it meets
backing board to prevent water infiltration and
seal all cracks and gaps accordingly. Drill (4)
1/2" (12.7mm) holes near corners of bottom and
(2) 1/2" (12.7mm) holes on each side near
bottom for ventilation purposes.
3. Use natural (untreated) softwood ONLY.
Thickness - 3/4" (19mm) to 1" (25mm).
DO NOT stain or paint interior or exterior. DO
NOT use plywood or chipboard. Wear gloves
when handling wood, as salt from sweaty hands
will encourage porcupines to chew the box.
4. If the wood you use is smooth-planed,
roughen exterior and interior panels with rasp or
coarse sandpaper for better "gripability".
5. Though not absolutely necessary, it is advisable to provide a hinged access door for cleaning purposes. Clean
ONLY during January or February, as box will be vacant during this period. Front or side door access is preferred over
top door access. Only adults should do the cleaning, and always wear leather gardening gloves when performing a
clean-out! Some other animals you might find using this nesting box are: birds, tree frogs, spiders, hornets,
bumblebees and deer/white-footed mice.
Place nesting boxes in your oldest stands of coniferous (preferred by sabrinus) or mixed forest. Min./Max. placement
height is 10'/26' (3m/8m). Place so that access hole faces opposite prevailing wind. Preferably, place so that
mammalian predators cannot reach box via limbs of other trees.
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I was lucky enough to pick these up second-hand as well. I'm going to have to build some matching tables for them.
Logan says hello!
Logan says hello!
October 17, 2025 at 2:20 AM
I was lucky enough to pick these up second-hand as well. I'm going to have to build some matching tables for them.
Logan says hello!
Logan says hello!
I wholeheartedly approve of your Morris chair+Mission-style lamp pairing. (I’ve done something similar.)
October 16, 2025 at 7:01 PM
I wholeheartedly approve of your Morris chair+Mission-style lamp pairing. (I’ve done something similar.)