Nature Watch, May 2018

Steve Jones, ever on the watch for birds, has some exciting sightings in May. 

Roller (zlatovrana) Roller (zlatovrana) Photo: Steve Jones

As Steve reports: Not a great deal to report in May, primarily as two weeks were spent in the UK. That said, the last two weeks of the month have been very interesting with several new sightings which I had not seen before on the island or elsewhere. Also without doubt I had an element of luck, being at the right place and the right time, as two of the new species were just glimpses: I saw the Sand Martin just once among swifts and swallows, and spotted the Lesser Grey Shrike just for a few seconds, but I was still just able to get photographic record shots for confirmation, though not good enough for publication. The Nightjar I recognized by its call, but as I have no hope of getting a daytime picture of one, I am aiming to be more successful with a night-time photo.

Sand Martin, photographed at Reculver Cliffs, UK, in April 2016 by John Ball

If you are an early riser around 04:30-04:45 you may have heard the “dawn chorus”. It's well worth getting up for at this time of year, even if you only do it once! More generally, you have probably noticed this month several species of bird carrying food to their young.

Red-backed Shrike sitting on her nest, Photo Steve Jones

If you are not familiar with House Martins, there is a good opportunity to see them in action at the post office in Vrbanj. They have built a nest right above the door, where the adults fearlesslyfeed their young, so no need for any binoculars or fancy equipment. Closer to home, in my garden, I have a Red Backed Shrike sitting on eggs (presumably). I took the photograph above last week of another Red Backed Shrike, also sitting, about 100 metres from my house.

Red-backed Shrike (male). Photo: Steve Jones

The male (pictured above) was to be seen quite close by where the female was sitting. There were four young in the nest, which fitted in perfectly until about mid-June. By 17th June, they were so big they were struggling to fit into the nest. Much as I wanted to get a picture of the adults feeding the young, I realised it was pretty well impossible, as they obviously kept away if they saw me anywhere near the nest.

Red Backed Shrike babies, 17th June 2018, growing up fast. Photo: Steve Jones

The Black Headed Bunting arrived at pretty much the same time as last year but I have only seen one so far, so they are nothing like as common as the Red Backed or Woodchat Shrikes.

Rose.Coloured Starlings. Photo: Steve Jones

I had a friend visiting for a few days and whilst out one morning we came across three Rose Coloured Starlings for a matter of seconds. I managed to get a record shot but before I could get another picture they were off.

Just minutes after this another first for the island – and that at the pond I visit almost daily. The Squacco Heron, this stayed for three days before moving on.

Squacco Heron. Photo: Steve Jones

Without doubt the highlight of the month was a short visit of two Rollers (zlatovrana). The photographs are poor as they were some distance and as it was a first for me. I spent more time looking through the binoculars at the birds than photographing. That said some adequate record shots. These were visible for about three minutes and despite me scouring the area pretty well every day since, no signs.

During the next three months I won’t be going out as frequently. Already things are beginning to quieten down, the Nightingale, which was singing incessantly, has already cut its singing down. I have only heard one Cuckoo in the last five days, but interestingly this year I have heard a female Cuckoo a few times. I still wonder what the host bird may be. My thinking is it might be a Corn Bunting, so if you see an active Corn Bunting, check it out: you never know, it may be feeding a Cuckoo!

Broad-Bodied Chaser Dragonfly. Photo: Steve Jones

The pond I visit is holding its water levels well, there are signs now of it dropping but it is still considerably higher than this time last year. I am also noticing quite a lot of dragonfly activity, several Emperors, Broad Bodied Chasers and an Emerald damselfly (I am awaiting confirmation on which Emerald species).

Emperor Dragonfly. Photo: Steve Jones

Finally a shot of everyone’s favourite ……………………….the Bee-Eater, which is one of the strongest draws attracting birding enthusiasts from cooler climates to Hvar.

Bee-Eater. Photo: Steve Jones

 

Species sighted in May 2018. Shaded areas mark species new to me on the island.
© Steve Jones, 2018
For more of Steve's nature pictures, see his personal pages: Bird Pictures on Hvar 2017, Bird Pictures and Sightings on Hvar 2018, and Butterflies of Hvar
Nalazite se ovdje: Home Novosti iz prirode Nature Watch, May 2018

Novosti: Ekologija.hr

  • UN-backed report finds even temporary rises above Paris agreement target could cause harm to glaciers and polar ice sheets

    Earth’s icy regions face such dangerous melting that global heating should be brought back below 1C after an inevitable period of overshooting global temperature targets, a UN report has found.

    Permanent and widespread losses of snow and ice expose a “persistent myth” that overshooting the 1.5C target of the Paris climate agreement – to 2C or 3C – could be manageable or even preferable to urgent cuts to emissions, the report found.

    Continue reading...

  • Devon nature reserve says ‘reckless’ theft of narrow-headed ant colony sets back years of conservation work

    A nest containing up to 5,000 of England’s rarest ant species has been stolen from a nature reserve, a conservation charity has said.

    Devon Wildlife Trust (DWT) said a nest of narrow-headed ants had been dug up and taken from Chudleigh Knighton Heath nature reserve in south Devon, which is the last place in England where the species still exists.

    Continue reading...

  • Action taken to prevent bottom trawling in the marine protected area and conserve porpoise populations

    Greenpeace activists have dropped boulders in the North Sea to snag the dragnets of industrial trawlers fishing in a marine protected area.

    Activists onboard the Greenpeace ship Arctic Sunrise dropped the giant stones to form an underwater barrier around the Southern North Sea marine protected area (MPA) – the UK’s most bottom-trawled MPA.

    Continue reading...

  • Disruption to winds above Arctic threatens to alter weather patterns across parts of continent in coming weeks

    The stratospheric polar vortex over the northern hemisphere is facing the prospect of an unusually early weakening. Forecast models suggest it could weaken significantly over the next 10 days, when it would typically be strengthening.

    A major sudden stratospheric warming (SSW) event is possible. This could influence weather patterns in the following weeks, increasing the likelihood of persistent areas of high pressure across the mid-latitudes and colder conditions weeks later.

    Continue reading...

  • A Guardian investigation has found that despite a recommendation to slow down, leading shipping companies continue to travel above advised speeds in a key habitat for cetaceans

    Marine biologist Alice Barbarioli waits with her camera trained on the horizon. A few minutes earlier, the hydrophone beneath the Pelagos research vessel detected codas – the sequence of clicks sperm whales use to communicate.

    The sperm whale reveals its head and dorsal fin as those onboard the vessel in the Pelagos sanctuary, a conservation area established to protect marine mammals in the north-western Mediterranean, rush to take photos and note the rhythm of its breathing. After a few minutes, the animal arches its back, and begins to head back into the depths of the sea. They wait to catch a glimpse of its tail.

    Continue reading...

  • Inkpen and Combe, Berkshire: If the price goes down, the village WhatsApp group lights up

    Beyond the reach of the gas mains, there is tension about the coming winter. Many rural homes have an open fire or wood burner, but most rely on kerosene oil for hot water and heating. Since the US-Iran war began, its cost has more than doubled. Currently, 1,000 litres (lasting 10-12 weeks) is £1,219. A year ago, it was £549. Seasoned wood is in demand.

    We watch the oil price rise, with none of the consumer protections afforded to gas customers. If the price per litre drops, as during the June ceasefire, the village WhatsApp group lights up.

    Continue reading...

  • Cop17, focused on protecting nature and restoring ecosystems, concludes on Saturday with critics saying system allows ‘one idiot’ to stall progress

    Calls are growing for major reforms to UN biodiversity summits as countries fail to deliver on their promises to halt the destruction of the natural world, with governments likely on track to continue their record of never having met a target in the 34-year history of the convention.

    Two weeks of negotiations at biodiversity Cop17 in Yerevan, Armenia, concluded on Saturday morning with countries vowing to redouble their efforts to meet this decade’s targets, which include commitments to protect 30% of the planet for nature, restore nearly a third of Earth’s degraded ecosystems and reform $500bn (£410bn) of environmentally damaging subsidies.

    Continue reading...

  • Timau’s industry has provided local Kenyans with an economic lifeline. But now, many believe it has made them seriously ill

    When Reuben Muriki fainted while doing a chore in the compound of his home near the horticultural town of Timau in central Kenya several years ago, it marked the start of a series of increasingly serious health episodes.

    His joints became swollen, his skin became discoloured and he found breathing difficult. He was in and out of hospital, and was forced to quit his work as a pesticide sprayer at a flower farm. Doctors treated him for suspected tuberculosis in vain.

    Continue reading...

  • At more than $52m, the race has become the most expensive in US history, but residents are fed up with flooding

    Aida Havel mulled her fate over coffee after working the early voting polls all day in Kill Devil Hills, North Carolina. “We are trapped,” she concluded.

    The Dare county commission candidate lives about 50 miles (80km) south, on Hatteras Island on the state’s Outer Banks.

    Continue reading...

  • From feeding schoolchildren to recycling tyres, these entrepreneurs are challenging stereotypes while solving social and environmental problems

    Africa is thought to have a higher proportion of female entrepreneurs than any other continent and yet many still struggle to access financing. Four business leaders from Nigeria, Uganda, Kenya and Malawi tell us about the inspiration behind their success – and the challenges women still face.

    Continue reading...

Novosti: Cybermed.hr

  • Od otpornog škroba do staničnih stijenki biljaka, znanstvenici istražuju skrivenu konkurenciju i suradnju među crijevnim bakterijama, postavljajući intrigantna pitanja o tome što se događa s različitim vlaknima nakon što dođu do debelog crijeva.

  • U nedavno objavljenoj studiji znanstvenici su procijenili učinke konzumacije oraha na imunoglobuline (Ig) i antitijela usmjerena protiv lipoproteina niske gustoće modificiranih malondialdehidom (MDA-LDL). Nakon dvije godine, dugotrajna konzumacija oraha bila je povezana s ukupnim koncentracijama IgG-a u serumu koje su bile približno 6% više nego u kontrolnoj skupini, što upućuje na mogući utjecaj prehrane na cirkulirajuće imunološke biomarkere. 

  • Aorta se često prvenstveno smatra najvećom krvnom žilom u tijelu - izdržljivim kanalom koji dostavlja krv bogatu kisikom iz srca u svaki organ. No, sve više dokaza upućuje na to da je stijenka aorte također aktivno imunološko okruženje. Imunološke stanice koje se nalaze unutar ili su regrutirane u različite dijelove aorte mogu utjecati na to kako se ova žila razvija, prilagođava mehaničkom stresu i postaje osjetljiva na bolesti.

  • Međunarodna studija izvještava o 60-postotnom preživljenju bez progresije bolesti 10 godina nakon autologne transplantacije koštane srži, pružajući važne dokaze o trajnim pozitivnim kliničkim ishodima i dugoročnoj sigurnosti kod pacijenata liječenih zbog rane, teške sistemske skleroze.

  • Novo istraživanje pokazuje da osobe s glioblastomom imaju aktivnije trombocite – stanice koje sudjeluju u zgrušavanju krvi. Trombociti također komuniciraju s drugim stanicama i mogu utjecati na imunološku aktivnost. Hiperaktivni trombociti kod osoba s glioblastomom usporavaju djelovanje T-stanica koje se bore protiv raka, što može pridonijeti rastu tumora i napredovanju bolesti.

  • Prepune karotenoida i drugih bioaktivnih spojeva, klice brokule i mikrozelenje privlače znanstvenu pozornost. Karotenoidi su prehrambeni pigmenti koji doprinose boji voća i povrća te pomažu u nekoliko fizioloških procesa. Karotenoidi uključuju karotenoide provitamina A, poput beta-karotena, alfa-karotena i beta-kriptoksantina, te karotenoide koji nisu provitamin A, poput luteina, zeaksantina i likopena. Karotenoidi mogu utjecati na osjetljivost na inzulin, metabolizam lipida, adipogenezu i upalnu signalizaciju.

  • Zubna caklina je visoko mineralizirani vanjski sloj zuba. Caklina štiti unutarnje slojeve zuba od šećera i kiselina koje unosimo hranom, kao i od svakodnevnog žvakanja, grizenja i trenja. Ona je najtvrđe tkivo u ljudskom tijelu.

  • Znanstvenici s Instituta za imunologiju La Jolla (LJI) i Sveučilišta u Washingtonu (UW) otkrili su da pacijenti s lupusom imaju neobične mutacije koje njihova tijela mogu pretvoriti u bojna polja. Spomenute su mutacije raširene u imunološkim stanicama zvanim neutrofili. Druge imunološke stanice doživljavaju mutirane neutrofile kao prijetnju – te pokušavaju uzvratiti napad. Ta unutarnja borba može doprinijeti razvoju bolnih upala, iscrpljujućih bolova u zglobovima i drugih ozbiljnih simptoma lupusa diljem tijela.

  • Rad u noćnim smjenama tijekom trudnoće povezan je s povećanim rizikom od neuroloških razvojnih abnormalnosti otkrivenih probirom kod djeteta do 4. godine života, otkriva novo straživanje. No, duljina noćnog prenatalnog sna tijekom ovog razdoblja može promijeniti ovu uočenu povezanost.

  • Niske razine vitamina B12 povezuju se s kardiovaskularnim bolestima, što je potaknulo znanstvenike da prouče kako nedostatak tog vitamina utječe na krvne žile, što klinička ispitivanja otkrivaju o uzimanju dodataka prehrani te koji bi pacijenti od toga mogli imati najviše koristi.

Novosti: Biologija.com