Brief Nature Watch, Spring 2022

Nature watcher Steve Jones paid a short visit to Hvar in April.

Hvar mongoose Hvar mongoose Photo: Steve Jones

Steve has now moved back to the UK for family reasons, but is still drawn to Hvar and its beautiful natural resources. He plans to visit as often as he can. This is his report from the few days he was on the island in April.

"Nice to be back! A very brief visit to “my old patch” on the island brought in the usual expected sightings. It gave me great pleasure to walk along the airfield and down to the pond, catching what is about, no day ever the same.

Cirl bunting. Photo: Steve Jones

Some birds were singing and setting up territory, so you know if a Cirl Bunting is singing at the bottom of the airfield it will be singing daily from that area, and a further two of them were heard on the way to the pond. Early April is a great time to visit as birds are arriving and setting up territories, while others are passing through to breed elsewhere – 4th April for example I saw a Redstart, only seen twice before on the Island (unlike the Black Redstarts that come in in October for the Winter), this will be clearly moving on.

Before I reached the island I saw several Swallows flying over between Zagreb and Split, and there were good numbers on Hvar over the airfield and around the pond. Some clearly just arriving.

Swallow. Photo: Steve Jones

During the first couple of days the weather turned colder, but there were still quite a few birds to see, including the Wheatear.

Wheatear. Photo: Steve Jones

On Sunday 3rd April 60-70 Yellow Legged Gulls were on the airfield where there was a covering of a heavy of hail appearing like snow. [Weather expert Norman Woolons identified this type of soft hail as 'Graupel'.]

Graupel hail in a Hvar field. Photo: Steve Jones
Yellow-legged gulls. Photo: Steve Jones

At the lower end of the airfield I picked up by call some yellow wagtails, I am thinking about 20 . You get several sub species of yellow wagtail so I group them all in the main species.

Black-headed yellow wagtail. Photo: Steve Jones

Of those I saw, one had a blue head, the other a black head. I saw another species at the pond but could not get a clear enough picture to publish.

Blue-headed yellow wagtail. Photo: Steve Jones

Whilst walking down to the pond saw a Kestrel perched on a tree looking out for prey and also a solitary Corn Bunting.

Kestrel on watch. Photo: Steve Jones

Sardinian warblers, which are resident, were also singing and calling.

Sardinian warbler. Photo: Steve Jones

On 4th April saw my first Whitethroat of the year, two others elsewhere on following days. Sadly I was not quick enough for a picture. Sub Alpine warblers, also recent arrivals, were beginning to sing, I saw them at three locations.

Sub-alpine warbler. Photo: Steve Jones

I had read and been told that Nightingales had already been in for a couple of weeks, so I was really disappointed in not hearing one, particularly when normally there would be three in 'my patch'. Nightingales are rarely seen, but I was lucky enough some time ago to have a regular Nightingale singing on display every morning in the early summer at about 06:30-06:45. Sadly all the pictures I took were looking into bright sunshine, so I have never managed to catch a decent picture of one. However a friendly, rather quizzical blackbird made up for that disappointment!

Blackbird. Photo: Steve Jones

There was a Wood Sandpiper or two at the pond and around but they are very sensitive to sound / movement. A couple of times I saw them fly well before I was at the pond or nearby. However the one day I first of all manged to see one through the short grass and managed a picture. It didn’t fly so I persevered for 30-40 minutes. Another flew in as well. I managed eventually a couple of quite decent pictures and getting to within five or so metres of the bird, obviously delighted.

Wood Sandpiper. Photo: Steve Jones

Last Wednesday I heard my first Cuckoo once again from an area heard in previous years. Sadly can’t get close enough to get a picture or even a sighting and it was only calling sporadically. Finally after visiting my old neighbours in Dol on Thursday, as I was leaving a Hoopoe flew right in front of the car, so I was delighted with that.

Hoopoe. Photo: Frank Verhart
A little mongoose family. Photo: Steve Jones

I saw a Mongoose on three separate occasions, possibly the same one three different times, once standing on its hind legs.

Also whilst out I saw several butterflies on the wing, Orange Tip, Bath White, Wall Brown and both Swallowtail and scare Swallowtail.

While I saw nothing that surprised me but more than happy with all the species picked up. Here's the list, in no special order:

Cirl Bunting
Swallow
Sardinian warbler
Chaffinch
Great tit
Cuckoo
Hoopoe
Blackcap
Hooded crow
Yellow legged gull
Wheatear
Kestrel
Blue tit
Wood sandpiper
Yellow wagtails
Serin
Corn bunting
Sub alpine warbler
Whitethroat
House Martin
Redstart
Greenfinch
Blackbird
Pheasant
Buzzard
Sparrowhawk

Until the next time ……………………."

© Steve Jones, 2022.

Footnote: Steve is sorely missed on Hvar, but we know he will be back as often as he can. In the UK, his birdwatching is very fruitful, and he has many like-minded friends to share his interest with. Shortly after his return, he sent us this picture of a Yellowhammer, a bird he has never seen on Hvar.

Yellowhammer. Photo: Steve Jones
Nalazite se ovdje: Home Novosti iz prirode Brief Nature Watch, Spring 2022

Eco Environment News feeds

  • Exclusive: Fixing a leak can be simple and equivalent to closing a coal power station, making lack of action maddening, say analysts

    The world’s worst mega-leaks of the potent greenhouse gas methane in 2025 have been revealed by an analysis of satellite data.

    The super-polluting plumes from oil and gas facilities have a colossal heating impact on the climate but often result from poor maintenance and can be simple to fix. The assessment found dozens of mega-leaks, each having the same global heating impact as a coal-fired power station.

    Continue reading...

  • Our photojournalist explores the Cornish landmark on the eve of its anniversary and meets some of its staff, visitors, plants and creatures

    “Give me a sleeping bag and I’ll happily sleep here overnight,” says Kim Mackintosh as she wanders amid the vibrant flora of the Mediterranean biome at the Eden Project on the eve of the tourist attraction’s 25th anniversary.

    Loupe in hand, the leader of the biome’s horticulture team is marvelling at an array of plants that have recently come into bloom, tenderly examining the yellow furry buds of an Acacia glaucoptera before flogging a Grevillea flower to dispense its rich, honey-flavoured nectar.

    Kim Mackintosh inspects the ‘kangaroo paw’ of an Anigozanthos through her loupe. All photographs by Jonny Weeks

    Continue reading...

  • From fluffy owlets to rosy-hued flamingos, Claire Rosen’s portraits of live birds took her on a journey that touched on colonialism, wallpaper design … and chickens

    Continue reading...

  • Drosopigi, the Mani, Greece: This rocky region’s abundance of flora takes the breath away – not least a long and winding trail of Chios chamomile

    The Greek name for this southernmost tip of the Peloponnese is linked to a Byzantine fort at Cape Tigani (called Megali Maina), but it may well also draw on the region’s desolate, mountainous rocky country that persists throughout the entire peninsula.

    The fierce Maniot people were well described by Patrick Leigh Fermor in his book Mani (1958), but the region has been more recently celebrated in Charles Foster’s brilliant The Edges of the World, published in January. In history the Mani was known variously for the relentless and sometimes centuries-long vendettas between its local clans, as a fertile recruiting ground for Mediterranean piracy and as an early outpost for Greek liberation from Ottoman rule.

    Continue reading...

  • Researchers project that reduced activity could contribute to half a million additional premature deaths annually by 2050

    Rising temperatures are making physical activity undesirable and even dangerous in many parts of the world, and as global heating worsens, it will further affect how much people are able to move.

    Researchers analysed data from 156 countries between 2000 and 2022 and modelled how rising temperatures may affect physical activity globally by 2050.

    Continue reading...

  • Exclusive: Claire Earley’s son Rex spent six weeks in hospital after contracting E coli from contaminated lake

    Realtime pollution alerts are needed across Windermere urgently, campaigners have said, as the mother of a seven-year-old boy who kayaked on the lake described how he nearly died after contracting a dangerous strain of E coli from contaminated water.

    Claire Earley’s son Rex spent six weeks in hospital, and underwent two emergency operations, after a family kayaking trip on Windermere last August.

    Continue reading...

  • Recording of humpback whale from 1949 could also provide new understanding of how the huge animals communicate

    A haunting whale song discovered on decades-old audio equipment could open up a new understanding of how the huge animals communicate, according to researchers who say it is the oldest such recording known.

    The song is that of a humpback whale, a marine giant beloved by whale watchers for its docile nature and spectacular leaps from the water, and was recorded by scientists in March 1949 in Bermuda, said researchers at Woods Hole Oceanographic Institution in Falmouth, Massachusetts.

    Continue reading...

  • Water shortages and rising heat is putting pressure on beer ingredients, but US brewers and farmers are adapting

    With St Patrick’s Day this week, millions of Americans are raising a glass. Beer remains the country’s most popular alcoholic drink with more than 6bn gallons consumed each year. But from water shortages to rising temperatures, the climate crisis is putting pressure on beer’s most essential ingredients.

    At Deschutes Brewery in Bend, Oregon, beer is either stacked high in warehouse rows or racing down a canning line and assembled into 12-packs. Inside the cavernous cellars, enormous 6,000-gallon tanks hold the latest batches in progress.

    Continue reading...

  • The Quapaw Nation is the only US Native community to carry out a cleanup of one of the country’s worst sites of environmental contamination

    They call this land the Laue. In the late 1800s, part of these 200 acres of grassland inside the Quapaw Nation were allotted to tribal citizen Charley Quapaw Blackhawk. After forcing dozens of tribes into Indian territory before the civil war, the US government then parceled out reservations and property to individual members. It was part of the government’s attempt to “civilize” Native Americans by turning them into private, not communal,landholders and yeoman farmers in the model of Thomas Jefferson’s ideal citizen.

    Yet, for the last century, little grew on the Laue. Half of it was buried beneath towering mounds of toxic rock known as chat piles. The waste rock, laced with chemicals, was left after miners extracted millions of tons of lead and zinc from the Tri-State Mining District, where the valuable ores stretched across Kansas, Missouri and Oklahomabetween 1891 and the 1970s. By 1983, the Environmental Protection Agency (EPA) had designated 40 sq miles that include nearly all the Quapaw Nation as the Tar Creek Superfund site, joining the EPA’s list of the most contaminated places in the country. Informally called a “megasite”, Tar Creek remains one of the largest and most complex environmental disasters in the country.

    Continue reading...

  • Hedgehogs’ habitat is shrinking, they’re vulnerable to cars, and pesticides are affecting their food supply. Here’s how we can help them pull through

    With stumpy, speedy legs, questing snouts and a fierce quiver of needles, hedgehogs are enchantingly strange, like fantasy creatures from a medieval bestiary. “It’s the nation’s favourite wild animal – every time there’s a vote or a poll, the hedgehog wins,” says ecologist Hugh Warwick, AKA “Hedgehog Hugh”, author of the Cull of the Wild and hedgehog champion.

    Continue reading...

Novosti: Cybermed.hr

  • Japanski registar identificirao je slijepu točku u rutinskoj skrbi pacijenata s kroničnom bolešću bubrega (CKD). Razina bikarbonata u serumu rijetko se mjeri, što metaboličku acidozu uglavnom ostavlja neotkrivenom i stoga nedovoljno liječenom. Metabolička acidoza česta je komplikacija kronične bubrežne bolesti i povezana je s gubitkom mišićne mase, bolestima kostiju, inzulinskom rezistencijom, ubrzanim propadanjem bubrega i povećanom smrtnošću. Kliničke smjernice preporučuju liječenje kada razina bikarbonata u serumu padne ispod 22 mEq/L.

  • Rezultati nove studije sugeriraju da bi povećanje unosa mlijeka na preporučene razine moglo smanjiti učestalost moždanog udara i smanjiti nacionalne troškove zdravstvene zaštite povezane s moždanim udarom, ističući kako male promjene u prehrani mogu donijeti značajne dobitke za javno zdravstvo.

  • Stres u ranom životu može dovesti do probavnih problema kasnije u životu, uzrokovan promjenama u crijevima i simpatičkom živčanom sustavu, tvrdi nova studija. Naime, ova studija pokazuje da stresori mogu imati stvaran utjecaj na razvoj djeteta i dugoročno utjecati na probleme s crijevima, a razumijevanje uključenih mehanizama može pomoći u stvaranju ciljanijih terapija.

  • Kolorektalni karcinom ostaje jedan od vodećih uzroka smrtnosti povezane s rakom u svijetu, uglavnom zbog metastaza i ograničenog odgovora na imunoterapiju kod većine pacijenata. Iako su inhibitori imunoloških kontrolnih točaka transformirali liječenje određenih podtipova tumora, većina kolorektalnih karcinoma ostaje "imuno-hladna", što znači da ne uspijevaju pokrenuti učinkovit antitumorski imunitet.

  • Upala, obilježje Crohnove bolesti, donosi nakupine ili agregate imunoloških stanica u submukozu. Koristeći sekvenciranje RNK pojedinačnih stanica (scRNA-seq) za proučavanje fibroze kod Crohnove bolesti, znanstvenici su otkrili neobično nakupljavanje endotelnih stanica - stanica koje obično oblažu krvne žile - oko ovih skupina imunoloških stanica (poznatih kao Crohnovi limfoidni agregati ili CLA). Ove nakupine stanica krvnih žila signaliziraju stanicama koje grade ožiljke (fibroblasti/miofibroblasti) izravno ili putem makrofaga da počnu proizvoditi prekomjernu količinu kolagena ili ožiljnog tkiva, što sugerira da ovi Crohnovi limfoidni agregati mogu imati značajnu ulogu u pokretanju procesa fibroze.

  • Znanstvenici otkrivaju kako promjene u vaginalnom mikrobiomu tijekom trudnoće mogu utjecati na upalu i rizik od prijevremenog poroda, ukazujući na nove terapije temeljene na mikrobiomu koje bi mogle poboljšati zdravstvene ishode majke i dojenčadi. Jednako tako, studija ističe dokaze koji upućuju na to da je okruženje u kojem dominiraju Lactobacillusi obično povezano s imunološkom tolerancijom, dok je disbioza povezana s fiziološki štetnim upalnim kaskadama.

  • Studija provedena na gotovo 16.000 odraslih osoba sugerira da često preskakanje doručka može biti povezano s većom vjerojatnošću razvoja metaboličkog sindroma, glavnog faktora rizika za srčane bolesti. Budući da je metabolički sindrom glavni faktor rizika za kardiovaskularne bolesti, ovi rezultati ističu potencijalnu važnost redovite konzumacije doručka radi poboljšanja kardiometaboličkog zdravlja.

  • Gotovo svi duktalni adenokarcinomi gušterače (PDAC) nastaju aktiviranjem mutacija u onkogenu KRAS, koje se javljaju u više različitih alelnih oblika. Iako su značajni napori doveli do razvoja inhibitora koji ciljaju specifične mutantne KRAS proteine, jedini agensi trenutno odobreni za kliničku upotrebu selektivno ciljaju varijantu KRASG12C. Međutim, mutacije KRASG12C su izuzetno rijetke kod raka gušterače.

  • Nedostatak vitamina B2 čini tumorske stanice osjetljivijima na jedinstveni oblik stanične smrti, pokazala je nova studija. Ljudsko tijelo ne može samo proizvesti vitamin B2, poznat i kao riboflavin, te ga mora apsorbirati putem prehrane. Vitamin B2 se može naći u mliječnim proizvodima, jajima, mesu i zelenom povrću. Metabolizam ga pretvara u molekule koje, između ostalog, štite stanicu od oksidativnog oštećenja. No, sada je nova studija pokazala da ova funkcija vitamina B2 ima i lošu stranu: također štiti stanice raka. Naime, vitamin B2 igra ključnu ulogu u zaštiti stanica raka od feroptoze, posebnog oblika programirane stanične smrti.

  • Topikalna krema aktivirala je imunološki odgovor kože i suzbila rast tumora u dva predklinička modela karcinoma pločastih stanica kože (cSCC), jednog od najčešćih karcinoma na svijetu, pokazala je nova studija. Krema, koju su razvili američki znanstvenici s Perelman School of Medicine at the University of Pennsylvania, djeluje blokiranjem LSD1, enzima koji suzbija puteve aktivacije imunološkog sustava u koži.

Novosti: Biologija.com

Izvor nije pronađen