Whenever I want an interesting image to leave at the top of TYWKIWDBI at the end of a blogging day, I can always rely on a photo of a slime mold. This image, taken in West Sussex by Kutub Uddin is a winning entry in the Wildlife photographer of the year 2026 competition, via a gallery in The Guardian.
Showing posts with label nature. Show all posts
Showing posts with label nature. Show all posts
14 October 2026
13 September 2026
A "fish nest"
Third Place, Conservation Hope. A male white-spotted pufferfish creates an intricate spawning nest in the sand. The fish carefully shapes a two-meter-wide radial pattern using only his fins. Built over several days, this structure and its subtle details reveal the extraordinary effort this small fish invests in reproduction.This was one of the winning photographs in the Ocean Photographer of the Year competition, from a gallery in The Atlantic. Photo credit Yuta Shigeno,
08 September 2026
Dragonflies migrate long distances
How do I get to be 80+ years old and not know basic facts about nature? This week I learned that dragonflies migrate as far as some birds and Monarch butterflies. I shared my summers with dragonflies up at Leech Lake in northern Minnesota, finding the nymphs and their empty shells on the shore and welcoming their emergence as mosquito-catchers. But I didn't know they migrated.
When it’s back-to-school time, North Shore naturalists such as Joe Walewski at Wolf Ridge Environmental Learning Center in Finland, Minn., know to watch the skies for green darners and other dragonflies soaring overhead on their fall migration journey...Like southbound birds that funnel along the North Shore to avoid Lake Superior’s open water, dragonflies also pass by Hawk Ridge Bird Observatory in Duluth — especially on sunny fair-weather days between late August and early September.Last year, Sept. 1 was clearly a favorite day to fly as Hawk Ridge counted 57,000 dragonflies. On Thursday, they counted 35,000, said Sean McLaughlin, lead counter for Hawk Ridge...Counters do estimates by 10s or even hundreds at a time when dragonflies are moving through quickly. Sometimes they’re dense enough to show up on radar like a rain cloud over Duluth.At 3 inches or longer, green darner dragonflies are usually the most numerous and easy to spot, with their vivid green thoraxes and bright blue abdomens. They’ve also been the most studied. Scientists have put tiny trackers on their bodies and learned the insects can cover 70 to 90 miles a day on their way to Gulf states or as far as Panama.More than a dozen species of dragonflies migrate, including white-faced and autumn meadowhawks, wandering gliders, black saddlebags and spot-winged gliders...Like monarch butterflies, migrating dragonflies only travel one way. They mate and lay eggs at the end of their journeys. Eggs hatch into nymphs in both southern and northern states, overwintering in ponds and waterways until they emerge onto land with wings to follow seasonal migration routes.
You learn something every day. Photo via Wikipedia.
"Narluga" explained
I didn't know this creature existed. Saw it mentioned recently and had to go back to a 2019 article by Ed Yong in The Atlantic for an explanation.
Belugas and narwhals are the same size, share the same Arctic waters, and are more closely related to each other than to any other species. Individuals from both species have been found swimming among each other’s pods...By analyzing DNA extracted from one of the creature’s teeth, a team led by Eline Lorenzen from the Natural History Museum of Denmark showed that it was a male, born to a beluga father and a narwhal mother. Most of its DNA was a half-and-half mix between the two species, but its mitochondrial DNA—a secondary set that animals inherit only from their mothers—was entirely narwhal. “A while back, we presented our findings at a conference of 150 people who are very into belugas, and you could hear a pin drop,” Lorenzen says. “None of them were familiar with hybrids between those two species.”
Lots more science at the link, but this paragraph is particularly interesting:
A brief digression: When naming hybrid animals, patriarchal conventions dictate that the father’s species comes first in the portmanteau. A cub born to a male polar bear and a female grizzly is a pizzly, but one with a grizzly dad and a polar mom is a grolar. So, technically, the skull from Larsen’s toolshed is a belwhal, not a narluga. But the latter name might well stick because it’s been called that for decades and, as Lorenzen says, narluga just sounds better.
So now I know what a pizzly and a grolar are. You learn something every day.
03 September 2026
The sinuous journey of a "leaf miner"
An outstanding example, nicely documented in Marcy O'Connor's absolutely outstanding Prairie Haven blog. This is one of the photos for August 2026. I encourage readers who are interested in the natural world to explore Prairie Haven, both in the monthly photo collections, and in the comprehensive listings of the "farm inventory" (wildlife) seen at this location over the past 26 years as it has been "unfarmed" back to its natural state. (The "people" section includes a photo with me in 2016 for a butterfly survey)
13 August 2026
Sparrowhawk vs. starling
I'll post one more bird photo, because I don't want to end the blogging day with a photo of J.D. Vance at the top of the blog column. This image was one of the winners in the British Wildlife Photography Awards for 2026, from a gallery in The Atlantic.
Nemesis. Winner, Animal Behavior. Parker: “Because the sparrowhawk had never gone to ground before on previous visits to the garden, and not knowing how long it would stay, I just wanted to get an image to record the event before then concentrating on my settings. The story I think the image portrays is evident in the eye contact between the two subjects and the vicelike grip they have on each other, however, the eye contact and grip of the juvenile starling is out of pure fear while that of its nemesis is one of dominance and relief in finally catching a much-needed meal.”
Weaver bird nest in India
Photograph: Anuwar Hazarika/NurPhoto/Shutterstock. Via The Guardian.
I will forever be in awe of how some birds can construct these nests without hands.
08 August 2026
The woodlouse as a "detritovore"
As an old English major, I've enjoyed accumulating a vocabulary of words ending in "vore." Most people know carnivore, herbivore, and omnivore; my hobbies and side interests introduced me to granivore, piscivore, insectivore, and frugivore (plus tangentially-related "locavore") (and hypercarnivore). Yesterday was my first encounter with "detritovore", which I encountered in The Guardian, where they presented the woodlouse as an entry in their annual "Invertebrate of the Year" competition.
Chucky pig. Slater. Monkey pea. Roly-poly. Boat-builder. Butchy boy. Cheeselog. Hobbling Andrew. Wood pig. If there were a prize for the range and joyfulness of a creature’s English-language names, the humble woodlouse would undoubtedly triumph over its million-plus invertebrate rivals.Over centuries of easy cohabitation with humans, it has acquired more than 300 regional names in Britain alone, and many more in other languages (such as Gwrach y Coed, “witch of the wood”, in Welsh).There are lovely words for woodlouse actions too: an animal rolling its body into a neat ball is known as conglobation, or volvation in zoology.
You can read more about the woodlouse at the link. For now I'm just enjoying the new "vore" word [there are lots of others...], and now also "conglobation" and "volvation."
06 August 2026
26 July 2026
Dandelion bonsai
It was not until my adult retirement years that I began to understand that dandelions are perennials. I have harvested some really deep-rooted ones in the loose soil of a backyard tomato patch (I even pondered entering one such plant into a state fair ag competition). And it was not until yesterday that I discovered that they can be used for bonsai-type art.
I found enough other material online to be reassured that the image above isn't pure AI. Whether it is true "bonsai" can be argued; you can read about such viewpoints at Reddit and via the Google AI.
12 July 2026
Trichromacy vs. dichromacy
Not sure I trust the image, but the principle appears to be valid.
Until the 1960s, popular belief held that most mammals outside of primates were monochromats. In the last half-century, however, a focus on behavioral and genetic testing of mammals has accumulated extensive evidence of dichromatic color vision in a number of mammalian orders. Mammals are now usually assumed to be dichromats (possessing S- and L-cones), with monochromats viewed as the exceptions.The common vertebrate ancestor, extant during the Cambrian, was tetrachromatic, possessing 4 distinct opsins classes. Early mammalian evolution would see the loss of two of these four opsins, due to the nocturnal bottleneck, as dichromacy may improve an animal's ability to distinguish colors in dim light. Placental mammals are therefore – as a rule – dichromatic.The exceptions to this rule of dichromatic vision in placental mammals are old world monkeys and apes, which re-evolved trichromacy, and marine mammals (both pinnipeds and cetaceans) which are cone monochromats. New World Monkeys are a partial exception: in most species, males are dichromats, and about 60% of females are trichromats, but the owl monkeys are cone monochromats, and both sexes of howler monkeys are trichromats.Trichromacy has been retained or re-evolved in marsupials, where trichromatic vision is widespread. Recent genetic and behavioral evidence suggests the South American marsupial Didelphis albiventris is dichromatic, with only two classes of cone opsins having been found within the genus Didelphis.
Excerpt from the dichromacy entry of Wikipedia (see also trichromacy). I didn't realize this. You learn something every day.
09 July 2026
The Al Naslaa rock in Saudi Arabia
Image cropped for size from the original posted at Live Science, where you can read about the controversies about the formation of the gap. See also Geology Science, which offers this image:
Personally I don't believe this formed as a result of a natural fault or joint. The rock itself is sandstone, so I would bet that humans created the gap using rope with perhaps added abrasives, perhaps just as a whimsy.
04 July 2026
Fiber-optic materials in Ukrainian birds' nests
Yana Hrynko, senior researcher of The National Museum of the History of Ukraine in the Second World War, shows bird’s nests made partially with fragments of fiber-optic lines that were found by a Ukrainian serviceman on the front line and then passed to the museum, in Kyiv, Ukraine, on June 23, 2026. Both Ukrainian and Russian troops use drones controlled via long lines of optic fiber to bypass electronic warfare jamming, leaving miles of ultra-thin lines tangled in trees and scattered across the land in Ukraine’s frontline regions. (Valentyn Ogirenko / Reuters)
One of the Photos of the Week in The Atlantic.
Here's the video from Reuters on this topic - with a tip of the blogging cap to an unidentified reader.
30 June 2026
Chipmunks
I first noticed the rodent activity last week (image above) at the place where the driveway meets the garage, so I replaced the gravel in the burrow and made a mental note to do something about it, but by yesterday (below) the process was obviously in an accelerated phase.
The quickest response would be to push all the dirt and gravel back down and then seal the top with an expanding foam, but I was reluctant to possibly convert the burrow into a live burial, so instead I got out our smallest Havahart trap, baited it with a piece of chicken teriyaki, and waited. Within a couple hours the malefactor was in the trap, and I drove him/her to a new homesite near fields and prairie about a mile away.
Then I reset the trap, not sure if this was one guy or possibly two. I captured a second one before evening and drove it over to where the first was released. Then I realized that I don't know that the ones I trapped are a mated pair and the occupants of the hole or just wandering neighborhood residents, so I decided to look up some info on their ecology and when they have their litters. Found this nice infographic -
That was new information for me. I did not realize that common chipmunks would create multiple entrances to their hidey-holes. Now I'm thinking that the risk of sealing a chipmunk family into a live burial horrorshow is unlikely, and that I can just go ahead with the cleanup and closure.
But one advantage of having a blog full of well-read and diversely-experienced readers is that sometimes I can call for help. So I'd appreciate advice from others with backgrounds in rodentology, mammalogy, pest control, or house maintenance.
Before leaving, I'll insert several tidbits from the Wikipedia entry:
The common name originally may have been spelled "chitmunk", from the native Odawa (Ottawa) word jidmoonh, meaning "red squirrel" (cf. Ojibwe ajidamoo). The earliest form cited in the Oxford English Dictionary is "chipmonk", from 1842. Other early forms include "chipmuck" and "chipminck", and in the 1830s they were also referred to as "chip squirrels", probably in reference to the sound they make. In the mid-19th century, John James Audubon and his sons included a lithograph of the chipmunk in their Viviparous Quadrupeds of North America, calling it the "chipping squirrel [or] hackee". Chipmunks have also been referred to as ground squirrels, (although the name "ground squirrel" may refer to other squirrels, such as those of the genus Spermophilus).Eastern chipmunks, the largest of the chipmunks, mate in early spring and again in early summer, producing litters of four or five young twice each year... Chipmunks construct extensive burrows which can be more than 3.5 m (11 ft) in length with several well-concealed entrances. The burrows are complex and include plugged entryways, nseparate compartments for nesting, multiple food chambers, side pockets and escape routes. The sleeping quarters are kept clear of shells, and feces are stored in refuse tunnels.
12 June 2026
Why mosquito eggs float
This hand-coloured scanning electron micrograph was the favourite of the jury in the section "Best Scientific Image". The image shows the surface of a mosquito egg (from Culex pipiens), which generates a water repellent network by connecting microscopically small structures to trap a thin layer of air. The vitally important structures avoid immersion and enable the egg to float and aggregate with neighbouring eggs.The website of photographer Martin Oeggerli. Reposted from 2013 because I had my first encounter with mosquitoes this week in the woods behind our house.
11 June 2026
Studying whiskers on an elephant's trunk
This is the sentence that piqued my curiosity:
"Haptic researchers discovered a difference of two orders of magnitude in the elasticity of the thousand whiskers of an Asian elephant's trunk as they progress from the base to the tip."
The sentence was one of the "Findings" listed in the May 2026 issue of Harper's Magazine (this recurring feature is a wonderfully eclectic potpourri of scientific observations). The source was not provided, but a brief search led me to the arXiv of Cornell University and to the source text: "Functionally graded keratin facilitates tactile sensing in elephant whiskers." The research was conducted at the Max Planck Institute in Stuttgart. Here is the abstract:
Keratin composites enable animals to hike with hooves, fly with feathers, and sense with skin. These distinct functions arise from variations in the underlying properties and microscale arrangement of this natural polymer. One well-studied example is mammalian whiskers, elongated keratin rods attached to tactile skin structures that extend the animal’s sensory volume. Here, we investigate the non-actuated whiskers that cover Asian elephant (Elephas maximus) trunks and find they are geometrically and mechanically tailored to facilitate tactile perception by encoding contact location in vibrotactile signal amplitude and frequency. Elephant whiskers emerge from armored trunk skin and shift from a thick, circular, porous, stiff root to a thin, ovular, dense, soft point. This smooth transition enables interaction with widely varying substrates, reduces wear, and increases the vibrotactile signal information generated during contact. The functionally graded geometry, porosity, and stiffness of elephant whiskers tune the neuromechanics of trunk touch, facilitating highly dexterous manipulation.
The non-scientist reader will want to skip down to the Conclusions to get a sense of the "why":
Biological functionally graded material composites like elephant whiskers can inspire engineered devices that use functional gradients to achieve specific capabilities ranging from fatigue reduction to signal power increases. One of the first animal stiffness gradients discovered was the beak of the Humboldt squid, but mimicry of this stiffness gradient in soft materials posed a considerable manufacturing challenge at the time of this discovery. Recent advances in multi-material 3D printing enable unprecedented control over the deposition of materials with widely varying mechanical properties; cutting-edge inkjet systems create monolithic parts from materials with elastic moduli that span three orders of magnitude. Recent characterization of composites built from these materials enables inverse design, whereby one achieves desired system properties such as stiffness, toughness, and frequency response by prescribing both geometry and constituent materials at the microscale. Fields ranging from material science and neuroscience to haptics and bio-inspired robotics rely on signal processing through material interfaces, and functional gradients have significant potential to enable programmable signal shifts tuned to specific use cases.
Back in the 1970s when I began my postgraduate science research, United States Senator William Proxmire (a Democrat!) was ridiculing bench researchers for publishing what he considered to be trivial scientific findings. He created a "Golden Fleece Award" to demean such research. Some of the research mocked at that time was probably truly trivial and wasteful of public resources, but the luddite attitude was unfortunate, and the humor involved may have carried over to influence public opinion of science. In those years I was studying the effect of serum complement and Protein A on the clearance of staphylococci and gram-negative bacteria from BALB/c mouse lungs; fortunately I was well below his radar.
I'm posting this now to make note of the "why" of studying elephant trunk whiskers. Mother Nature has been doing hard science for millennia, and finding out how she achieved results can guide humans in an endless variety of quests.
06 June 2026
Creating ponds for wildlife

I don't have access to saltwater tidepools, so in my world the most fascinating microenvironment is that of a freshwater pond. I was therefore delighted to read an article about a fellow who is turning his earthmoving skills into creating ponds de novo on the English countryside.
Britain has lost at least 400,000 ponds over the past century, according to the Freshwater Habitats Trust. A similar number remain but many are overgrown, degraded or affected by nutrient pollution.“Everyone realises we’re in a sorry state with freshwater and it needs to be addressed,” says Hancox, of Creative Wetlands, a contractor who has dug scores of new ponds for charities and rewilding projects across Britain.Hancox acquired his skills – the excavator “becomes an extension of yourself, it just flows,” he says – digging landfill sites and golf courses for his family’s groundworks company. “My original job was a shaper on golf courses. We travelled all over, to Portugal, Germany, Belgium, building bunkers and drainage – everything really that wasn’t good for wildlife. I’ve always had a massive interest in wildlife, so we’ve got to the stage now where we want to put something back.”At Heal Somerset, a 185-hectare (460 acre) former dairy farm being turned over to nature by the charity Heal Rewilding, Hancox is digging four new ponds, including one double-bowled pond 30 metres in diameter.The ponds are specifically for great-crested newts, which have been found in low numbers on the farm but have no suitable ponds in which to breed. Usually within a year of being created the ponds fill with aquatic life, including damselflies and dragonflies, and provide food and shelter for birds, from moorhens to house martins, who feed on the insects and use the pond-side mud to build nests...Crucially, these new ponds are not connected to any river system, which can wash nutrient-rich or polluted water into them. Instead, they are charged by clean rainwater or clean groundwater, enabling more delicate aquatic plants to thrive.
Kudos to this fellow for shifting from creating golf courses to creating wildlife ponds. And kudos to the farm family that has hired him to do the work. Reminds me of the people who install wildlife guzzlers in the desert.
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