While its black plumage identifies it as a crow, the chough (pronounced 'chuff') has a red bill and legs unlike any other member of the crow family. It is restricted to the west of the British Isles.

It readily displays its mastery of flight with wonderful aerial displays of diving and swooping. This Schedule 1 species can be found in flocks in autumn and winter.

There are two species of passerine birds commonly called chough that constitute the genus Pyrrhocorax of the Corvidae (crow) family of birds. These are the red-billed chough (Pyrrhocorax pyrrhocorax), and the Alpine chough (or yellow-billed chough) (Pyrrhocorax graculus). The white-winged chough of Australia, despite its name, is not a true chough but rather a member of the family Corcoracidae and only distantly related.

The choughs have black plumage and brightly coloured legs, feet, and bills, and are resident in the mountains of southern Eurasia and North Africa. They have long broad wings and perform spectacular aerobatics. Both species pair for life and display fidelity to their breeding sites, which are usually caves or crevices in a cliff face. They build a lined stick nest and lay three to five eggs. They feed, usually in flocks, on short grazed grassland, taking mainly invertebrate prey, supplemented by vegetable material or food from human habitation, especially in winter.

Population:

UK breeding:

250-350 pairs in Great Britain; 120-150 pairs on the Isle of Man

While its black plumage identifies it as a crow, the chough (pronounced 'chuff') has a red bill and legs unlike any other member of the crow family. It is restricted to the west of the British Isles.

It readily displays its mastery of flight with wonderful aerial displays of diving and swooping. This Schedule 1 species can be found in flocks in autumn and winter.

There are two species of passerine birds commonly called chough that constitute the genus Pyrrhocorax of the Corvidae (crow) family of birds. These are the red-billed chough (Pyrrhocorax pyrrhocorax), and the Alpine chough (or yellow-billed chough) (Pyrrhocorax graculus). The white-winged chough of Australia, despite its name, is not a true chough but rather a member of the family Corcoracidae and only distantly related.

The choughs have black plumage and brightly coloured legs, feet, and bills, and are resident in the mountains of southern Eurasia and North Africa. They have long broad wings and perform spectacular aerobatics. Both species pair for life and display fidelity to their breeding sites, which are usually caves or crevices in a cliff face. They build a lined stick nest and lay three to five eggs. They feed, usually in flocks, on short grazed grassland, taking mainly invertebrate prey, supplemented by vegetable material or food from human habitation, especially in winter.

Population:

UK breeding:

250-350 pairs in Great Britain; 120-150 pairs on the Isle of Man

Florida’s Eastern Meadowlark (Sturnella magna) is a songbird found throughout rural areas of Florida. Its breeding range covers most of eastern North America and parts of South America. Experts say it is difficult to distinguish between the Eastern and Western species as it can be determined only by voice and location. Seventeen subspecies of the Eastern Meadowlark are documented.

Actually, the meadowlark is not a lark at all. It is a member of the blackbird family (Icteridae) which also includes cowbirds and orioles. Meadowlarks are easily identified by the bright yellow throat and belly. However, the most distinguishing mark in adults is the black “V” on its chest. It can often be seen on a fence post belting out its clear, melodious songs and whistles.

Adult birds weigh just over five ounces, are seven to ten inches tall with a wingspan of 14 to 16 inches. Both sexes are similar in size, although females are normally smaller with a shorter wingspan.

This bird prefers grassy fields, pastures, cultivated fields, golf courses and other open habitats. It is a good friend to the farmer/rancher and a bug-eating machine. Insects comprise more than 75 percent of its diet, with grains and seeds making up the balance. It is especially fond of grasshoppers and crickets, as well as insect larvae and grubs. It feeds on the ground, picking insects from the surface or probing the soil to reveal its prey. Meadowlarks also eat the seeds of many weeds.

Males have two, sometimes three, mates at a time. Females build nests on the ground using soft woven grasses and hide them in the taller grass of an open field. The nest usually has an arched “roof” with a side entrance. A clutch of two to six grayish-white eggs speckled with brown and lavender may be laid any time from late March through July. Eggs are incubated by the female for 13 to 15 days. The young fledge at 12 days. The parents continue to tend them for about two weeks until they are able to fly. Juveniles are similar to adults, but the black “V” becomes prominent in adulthood. The meadowlark has been known to live ten years in captivity.

I found this one along Joe Overstreet Road in Osceola County, Florida.

Never saw this strange beauty before ;-))

"Helvella is a genus of ascomycete fungus of the family Helvellaceae. The mushrooms, commonly known as elfin saddles, are identified by their irregularly shaped caps, fluted stems, and fuzzy undersurfaces. They are found in North America and in Europe. Well known species include the whitish H. crispa and the grey H. lacunosa. They have been reported to cause gastrointestinal symptoms when eaten raw." - WiKi

"Kluifzwammen (Helvella) is een geslacht van schimmels. Soorten uit dit geslacht komen voor in Noord-Amerika en Europa.

Bekende soorten zijn de witte kluifzwam (Helvella crispa) en de zwarte kluifzwam (Helvella lacunosa). Door de geplooide of gegroefde steel en hoed zien deze zwammen er uit als hondenkluifjes." - WiKi

… moored in Canary Wharf.

Yachts identified as Bravo Eugenia, Phi and Here Comes The Sun by Léandre Loyseau of Superyacht Times.

..

Every leaf on this tree looked just like this - half bright red, half green. [The other two leaves just came home with me so I could identify them].

I'm heading north for a few days to see how the color is in upstate NY [and to visit family too].

Identify plantnet wasn't very confident of its artificially intelligent identification, but we'll go with Filipendula ulmeria, and the rose family.

Thank you for looking! Isn't God a great artist?

Thanks to Eiona Roberts for identifying it as a Cricket and Joan Disley for naming it as a Dark-Bush Cricket

I got lots of shots of blur and empty leaves before he stopped jumping just long enough to get this shot.

Taken on a walk near our South Wales home

this is identified as Paph. Hilo Citron 'Giant Doral' x Pap. Spring Wolf 'New Horizon' and it came from J&L Orchids in Easton, CT

Chough - Pyrrhocorax pyrrhocorax

While its black plumage identifies it as a crow, the chough (pronounced 'chuff') has a red bill and legs unlike any other member of the crow family. It is restricted to the west of the British Isles.

It readily displays its mastery of flight with wonderful aerial displays of diving and swooping. This Schedule 1 species can be found in flocks in autumn and winter.

There are two species of passerine birds commonly called chough that constitute the genus Pyrrhocorax of the Corvidae (crow) family of birds. These are the red-billed chough (Pyrrhocorax pyrrhocorax), and the Alpine chough (or yellow-billed chough) (Pyrrhocorax graculus). The white-winged chough of Australia, despite its name, is not a true chough but rather a member of the family Corcoracidae and only distantly related.

The choughs have black plumage and brightly coloured legs, feet, and bills, and are resident in the mountains of southern Eurasia and North Africa. They have long broad wings and perform spectacular aerobatics. Both species pair for life and display fidelity to their breeding sites, which are usually caves or crevices in a cliff face. They build a lined stick nest and lay three to five eggs. They feed, usually in flocks, on short grazed grassland, taking mainly invertebrate prey, supplemented by vegetable material or food from human habitation, especially in winter.

Population:

UK breeding:

250-350 pairs in Great Britain; 120-150 pairs on the Isle of Man

I was unable to identify this plant, but two commenters (see below) have done so for me. It's an evening primrose (Oenothera speciosa).

The plant was growing wild, with the flowers, which were about 2 in/5 cm across, fairly close to the ground. Thanks for looking! Isn't God a great artist?

Through the magic of a telephoto lens, no trespassing laws were broken.

This is an other flower variety that I could use some help identifying.

-Vervain Mallow - thanks Kay!

The first time I saw a Short-tailed Hawk it was in a Cypress Tree having lunch. I looked and looked through my bird books and references online and couldn't identify it. It was a dark phased individual and everywhere I had been looking showed it in its light phase, like this one. When I saw this one soaring down in Miami, I was pretty sure that it was a Short-tailed. Looking at images online I believe that this one is a juvenile. The adult has a more distinctively dark head and whiter chest and belly. They eat smaller birds, like grackles, red-winged black birds and meadowlarks. I've read that they hunt from the air, often making a series of swoops down taking their prey off a perch or possibly in the air. It's a sight I've never seen and only rarely see this species. (Buteo brachyurus)

Correction. Thanks to the help of several folks and my own research I've determined that this is a Red-shouldered Hawk. (I hope I'm right.) Short tailed hawks have a cleaner belly and chest and the light phase has a very dark head and the white of the chest forms a thick line up to the bill. Learning is half the fun.

C'était une énorme surprise quand ma femme m'a prévenu que cet oiseau est venu se poser sur la bâche d'hivernage de la piscine pour y faire sa toilette. Il y est resté 11 minutes ce qui m'a permis de le photographier longuement, un moment magique. La plupart d'entre vous vont l'identifier facilement, pour les autres la réponse dans les jours à venir.

It was a huge surprise when I saw this bird land on the winter cover of the pool to wash up. It stayed there for 11 minutes, which allowed me to photograph it at length, a magical moment. Most of you will identify it easily, for others the answer in the following days.

My best effort identifies this damselfly as a Powdered Dancer in blue form. Still with the morning's dew on its back, it rests upon the bloom of an American Water Willow. Water Willow is a perennial which commonly colonizes along the edges of Ozark streams and is a host to many dragonflies, damselflies, bees and butterflies. If you would like to see the colonization of water willow along a stream and discover some of an Ozark stream's beautiful and amazing inhabitants, above and below the water, I would be honored if you took a look at my latest blog post here: www.gmichaellewis.com/blog/2015/6/life-of-an-ozark-stream

I have taken this photo in Museum of Illusions located in Lower Manhattan, New York during my visit to the museum on January 10, 2020.

... identified this rare breed with the matching gray head like me ;))

The White-browed Shrike-babbler (Pteruthius flaviscapis) is a small bird found in the Himalayas and parts of Southeast Asia - its a beautiful bird and a target of mine for a long time - never managed to see it before till my trip few weeks ago.

Around 12-13 cm in length with a distinctive plumage and a bold white eyebrow stripe, dark crown and ear coverts, and a bright yellow or yellowish-green wing patch, the male is easy bird to identify since there are few birds like this. These birds are primarily found in montane forests, often in dense undergrowth. I sighted several in a pine forest foraging in the dark canopy and waited more than 90 mins for them to come to a spot where I can take some pictures - luckily they did and I am delighted!

These birds are active foragers, gleaning insects and other invertebrates from foliage and branches. The calls are typically high-pitched and thin, often described as a series of whistles or trills.

Shrike-babbler's are a different species altogether - neither shrikes nor babblers. Their name comes from their shrike-like bill and babbler-like behavior.

Thanks in advance for your views and feedback. Much appreciated.

One of my target birds for few years now, finally got the pictures I wanted. This is a migratory visitor from the foothills of Himalayas to South India. The male is quite easy to identify since its the only pink bird we see in our region and quite beautiful in its breeding plumage. The female is quite brown and barely has shades of pink on it.

We travelled to the western side of India for 2 days to visit a farm in the countryside where several of these birds make a visit every year. That organic farm hosts these Rosefinches along with Vernal Hanging parrots, Crested Buntings and other Minivets. For 3 months, the crop is laid just for these birds and is eaten by the birds entirely. In fact, 2 rounds of crop is laid for the birds. By the end of October, the birds disperse all over the countryside.

The Winter migration is underway in many parts of the country and we are seeing signs of a good winter. These Rosefinches after a long journey need the food and the farm is an easy place for them.

Thank you so much in advance for your views, feedback and faves.

ITALY 2000

We went to Italy for the first time on a two week vacation.

Week one, we visited Venice, The Dolomites and all over Lake Garda. We stayed in Riva and travelled to Malcesne, Limone, Sirmiome and Salo.

Week two, we stayed in Montepolciano and visited Montalcino, Orvietto, Sienna and Verona.

It was a fantastic time and a great memory of my wife’s 50th birthday. These images were recovered from over 6,000 negatives that I thought were lost but after scanning and editing, they are ready for posting. Not the best quality in the world but I’m glad I have found them again.

One thing though, I'm not sure that I have correctly identified the locations so if I have made a mistake please assist.

(Glaucidium cuculoides)

Mandal

Uttarakhand

Índia

We were photographing the species that appeared when the guide excitedly told us that an owlet was vocalizing. Since we hadn't photographed an owlet before, we tried with renewed enthusiasm to identify the origin of the sound, but quickly became discouraged as it seemed beyond our capacity to identify a bird that we already knew to be very small, although we had never seen one before. We refocused on what was displayed before our eyes and didn't think about it anymore.

After about 15 minutes, the guide exclaimed excitedly, "it's over there". However, even with the explanation of where to look, it was not easy and some of us took a few minutes to follow the instructions of the trunks to find this small, but beautiful, ball of feathers!

We spent another 10 minutes photographing this beauty, searching for possible angles, backgrounds, and frames. I even managed to find a second bird by myself. The difficult part is finding the first one :)

==================***==================

All my photos are now organized into sets by the country where they were taken, by taxonomic order, by family, by species (often with just one photo for the rarer ones), and by the date they were taken.

So, you may find:

- All the photos for this trip Índia (2023) (213)

- All the photos for this order STRIGIFORMES (66)

- All the photos for this family Strigidae (Estrigídeos) (61)

- All the photos for this species Glaucidium cuculoides (1)

- All the photos taken this day 2023/03/08 (16)

==================***==================

its full potential, that word would be 'meetings' :-)

― Dave Barry

HBM!!

eastern tiger swallowtail butterfly, sarah p duke gardens, duke university, durham, north carolina

this texture which I have identified in my "overlay vault" as from 'anji one' - does not appear to be listed in flickr currently. if that is in error, please let me know so I can credit her properly.

the hybrid is her fabulous texture crossed with a small section of my charming parrot tulip.

update: anji one is alive and well!

www.flickr.com/photos/anjijohnston/3127641362/in/set-7215...

Den Helder - Zeepromenade

Copyright - All images are copyright © protected. All Rights Reserved. Copying, altering, displaying or redistribution of any of these images without written permission from the artist is strictly prohibited.

Sorry I cant be more descriptive than this, if anyone can identify please do let me know!

Minettia species (possibly M.longipennis)

This one can be found in Akaroa, New Zealand

Own image processed with Topaz Studio 2

~~~ Thank you all for viewing, kind comments, favs and awards - much appreciated! ~~~

Taken inside a garden at Wat Ounalom. Not exactly sure what it is, but Google Lens identified it as Cactus Coreid, a.k.a. a Chelinidea vittiger bug. S/he must have been napping in the sun since I got very close for this capture and s/he didn't move. 😁

PS: to those I follow 🙋♂️

Apologies for falling behind with comments and faves. After I turned sixty, I thought I would have more free time but I'm now working six days a week from 6 AM to 6 PM. I love my job; not complaining too much, but it's taking a toll on the free time I have for Flickr. Taking a timeout for a month or two. No hard feelings if you unfollow me.

Thank you for your understanding! 💖

Pink Beard-heath, Leucopogon ericoides

Papillon_45_HDR

www.lepinet.fr/identifier/miniatures.php?e=p

Happy Gorgeous Green Thursday.

BTW...if anyone can identify the bird, I'd love to know what it is. I thought tri-colored heron, but I'm not sure.

I can't remember for sure, but I think I shot this through glass. There's a bird "blind"...shack, observatory, something with big glass windows and benches to sit on, from which one can observe the various birds in the area. I have shots that I know for sure were taken from the shack...but I can't remember for certain about this one.

A waterbird and a member of the rail and Crake family, this is a large bird around 40-45 cms long and weighing half a kilo or more. They are quite large compared to the other waterbirds here, but they are so impossible to sight in the green fields where they reside. They are easily identified by the frontal red shield and calls.

The birds stick to the foot long grass in the countryside and hence very hard to spot - any sighting in our region is considered rare. I had sighted this bird many times, but just could manage a distant poor shot.

But one early morning, on an open riverside road surrounded by grass and fields, several males were calling out and flying from one side of the road to the other. I was lucky to be able to get some shots of the bird much to my satisfaction. This one is a male, the female is more brownish in color.

Thanks in advance for your views and feedback. Much appreciated.

Another mushroom I couldn't identify. With a very small creature on the stem of the fungus.

Not 100% sure on this one but I believe it is a hibiscus. Very delicate crepe paper like petals.

Newly identified as a purple flowered rock rose! Thanks to David Nice for the ID.

Can anyone identify this ladybird for me please?

Taken in Southend-on-sea Essex UK.

Vinicolors, identified by Ron Hanko. Thanks Ron.

www.flickr.com/photos/ronaldhanko/

Identified by its most prominent field mark, an acorn in the beak, an Acorn Woodpecker removes a nut from its storage locker along the Boot Canyon Trail in the Chisos Mountains of Big Bend National Park.

Missed identified as Bullock's..It was there on out last visit, it was ubiquitous on this trip. The lifer we saw but didn't capture an image of is a female Olive Warbler, and we heard a Northern Pygmy-Owl. No more lifer until next trip...

Plume Moth Caterpillar (Pterophoridae)

Guessing Fire Flag Plume Moth (Sphenarches anisodactylus) (family Pterophoridae))

Seen recently in the garden. Identified with help from Daniel H.

The first time I have seen a Caterpillar of this family.

A rare immigrant not identified in the UK until 2003. Only 54 previous Sussex records prior to 2025. Taken at home

Blue Ridge Parkway, North Carolina

Okay, I actually took a course entitled "Identifying Those Damn Yellow Composites" from the famous (occasionally infamous ;-) George Sanko. Without plucking the flower (certainly not permitted!) and studying it under my microscope, I can't offer an identification. I know quite a number of species that it ISN'T, but yellow flowers of all varieties seem to be my black hole of identification. Perhaps someone more knowledgeable can help me out on this one. And, as an aside, even if I had plucked this lovely blossom and studied it under my microscope, I am quite certain I would still be at a loss...

* Today (7/19/19) I received a definitive identification of this plant from Alan Weakley. Not a sunflower after all!

special ring began his racing career on grass tracks in france, he's won nearly a million dollars in his career.....notice the identifying tatoo on the upper lip...

Can anybody identify this animal print? Something has been walking around my backyard and making weird sounds in the middle of the night. It would be nice to know what's out there. Thanks!

Central Maryland

iPhone 5

2016

Pouvez-vous identifier deux comportements remarquables de la chouette épervière dans cette image ?🤔

En premier lieu, la chouette emploie sa queue comme un troisième point d'appui, de façon similaire à un pic-bois. Chose qui ne m'avait jamais frappée avant de regarder cette photo.

Secondo, si vous dirigez à nouveau votre regard vers le bas de la queue, à gauche, vous apercevrez la queue et la patte d'un campagnol qu'elle a dissimulées entre l'arbre et l'écorce. Comme c'est le cas pour de nombreux oiseaux, la chouette enfouit de la nourriture aux quatre coins de la forêt afin de se préparer à une éventuelle disette.

Nous saisissons désormais la raison pour laquelle on dit qu'on est jamais vraiment confortable lorsqu'on est "entre l'arbre et l'écorce"...😉

Can you identify two remarkable behaviors of the northern hawk owl in this picture?🤔

Firstly, the owl uses its tail as a third fulcrum, similar to a woodpecker. Something that had never struck me before looking at this photo.

Secondly, if you look again at the bottom left of the tail, you'll see the tail and leg of a vole that it has hidden between the bark and the tree. As is the case with many birds, the owl buries food in the four corners of the forest in preparation for a possible dearth.

Now we understand why it's said that you're never really comfortable when you're “between the bark and the tree...😉

Beautiful world

Temperature just around zero degrees Celcius.

Hair ice (also known as ice wool or frost beard) is a type of ice that forms on dead wood and takes the shape of fine, silky hair. It is somewhat uncommon, and has been reported mostly at latitudes between 45 and 55°N in broadleaf forests. The meteorologist and discoverer of continental drift, Alfred Wegener, described hair ice on wet dead wood in 1918, assuming some specific fungi as the catalyst, a theory mostly confirmed by Gerhart Wagner and Christian Mätzler in 2005. In 2015, the fungus Exidiopsis effusa was identified as key to the formation of hair ice.

Formation

Hair ice forms on moist, rotting wood from broadleaf trees when temperatures are slightly under 0 °C (32 °F) and the air is humid. Each of the smooth, silky hairs has a diameter of about 0.02 mm and a length of up to 20 centimetres (7.9 in). The hairs are brittle, but take the shape of curls and waves. They can maintain their shape for hours and sometimes days. This long lifetime indicates that something is preventing the small ice crystals from recrystallizing into larger ones, since recrystallization normally occurs very quickly at temperatures near 0 °C.

The hairs appear to root at the mouth of wood rays (never on the bark), and their thickness is similar to the diameter of the wood ray channels. A piece of wood that produces hair ice once may continue to produce it over several years.

In 2015, German and Swiss scientists identified the fungus Exidiopsis effusa as key to the formation of hair ice. The fungus was found on every hair ice sample examined by the researchers, and disabling the fungus with fungicide or hot water prevented hair ice formation.[1] The fungus shapes the ice into fine hairs through an uncertain mechanism and likely stabilizes it by providing a recrystallization inhibitor similar to antifreeze proteins.

Source: en.wikipedia.org/wiki/Hair_ice

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Cheveux de glace

Les cheveux de glace, ou chevelure de glace, sont le phénomène d'apparition de glace sous forme de filaments très fins, par temps de gel, à partir de morceaux de bois mort ou d'autre végétaux. Le phénomène est comparable mais distinct des pipkrakes, issues du sol et plus grossières. Les cheveux de glace sont différents du givre par leur apparence comme par leur formation.

Formation

La formation des cheveux de glace se produit dans des conditions météorologiques particulières : par gel modéré et lorsque le sol, très humide, n'est pas encore gelé. Le phénomène est rare et s'observe plutôt dans les sites ombragés et tôt le matin.

Les cheveux de glace apparaissent sur des végétaux particuliers, comme le bois mort de hêtre ou de chêne. Leur observation donne à penser que l'eau contenue dans le bois est expulsée à travers les pores du bois par son expansion à l'approche du point de congélation, et gèle sous forme de fils très fin au contact de l'air. Le mécanisme pourrait néanmoins être plus complexe et être lié à la présence de champignons sur ces bois en décomposition; en 2015, le champignon Exidiopsis effusa (en) a été identifié comme essentiel à ce mécanisme. La poussée de ces fils de glace peut avoir une force suffisante pour repousser l'écorce d'un bois mort. La formation est très fragile, elle se détruit au toucher ou au souffle et disparait naturellement par fonte ou sublimation si elle est exposée au soleil.

Historique

En 1918 Alfred Wegener évoque que le mycélium sur le bois en décomposition contribue au phénomène. En 2014, Christian Mäztler, physicien de l’université de Berne associé à Diana Hofmann, chimiste et Gisela Preuss, biologiste ont élucidé le mystère de leur formation.

Source: fr.wikipedia.org/wiki/Cheveux_de_glace

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Haareis, manchmal auch Eiswolle genannt, besteht aus feinen Eisnadeln, die sich bei geeigneten Bedingungen auf morschem und feuchtem Totholz bilden können. Anders als Hydrometeore (zum Beispiel Raureifkristalle) entsteht Haareis aus dem im Holz enthaltenen Wasser, nicht aus Luftfeuchtigkeit.

Ähnlich aussehende und häufig nicht genau unterschiedene Phänomene sind Bandeis (engl. ice ribbons, ice flowers) an Pflanzenstängeln und Kammeis (engl. needle ice) am Boden, die beide jedoch anders gebildet werden.

Entstehung

Wissenschaftlich ist die Entstehung des nur selten zu beobachtenden Haareises noch wenig erforscht. 1918 beschrieb der Meteorologe Alfred Wegener Haareis auf nassem Totholz. Er vermutete einen „schimmelartigen Pilz“ als Auslöser, was jedoch von anderen Wissenschaftlern angezweifelt wurde, die rein physikalische Prozesse wie bei der Entstehung von Kammeis als Ursache annahmen.

Eine biophysikalische Studie von Gerhart Wagner und Christian Mätzler bestätigte 2008 Wegeners Vermutung weitgehend. Demnach wird Haareis durch das Myzel winteraktiver Pilze (u. a. Schlauch- und Ständerpilze) ausgelöst, deren aerober Stoffwechsel (Dissimilation) Gase produziert, die das im Holz vorhandene leicht unterkühlte Wasser an die Oberfläche verdrängen. Dort gefriert es und wird durch nachdrängende, beim Austritt aus dem Holz ebenfalls gefrierende Flüssigkeit weitergeschoben. Dies geschieht ausschließlich bei Temperaturen knapp unter dem Gefrierpunkt, wenn das Wasser im Holz noch nicht gefroren ist, es an der geringfügig kälteren Umgebungsluft jedoch gefriert. Eine Randbedingung für die Haareisbildung ist außerdem hohe Luftfeuchtigkeit: Wenn die Luft nicht mit Wasserdampf gesättigt ist, sublimieren die feinen Eiskristalle kurz nach ihrer Bildung an der Holzoberfläche, so dass keine langen Haareiskristalle entstehen können. Eine Reproduktion von Haareis ist in Versuchen solange möglich, wie das Pilzmyzel im Holzkörper nicht abgetötet wird.

Quelle: de.wikipedia.org/wiki/Haareis