There’s no birding or ringing for a day or two thanks to continuing poor weather so I’m posting information about a couple of recent ringing records. One is a Sand Martin at Cockerham quarry, the other a Linnet from our Linnet project at Gulf Lane, Pilling/Cockerham Marsh.
Linnet
We ringed Linnet number S800115 as a juvenile male on 10 August 2017- Biometrics: Wing: 81.0 mm. Weight: 17.8 g. Time: 10:00:00 hrs
Our Linnet was recaptured on 04 May2018 at Walney Island Bird Observatory, Cumbria. Although the distance between the two points is negligible, the date of both the original ringing and the recapture are much more interesting.
The month of August points to a juvenile dispersal, maybe from Cumbria but with a possibility that the bird’s place of birth was further north. The timing of its return on a northward track during May is within the peak of period of Linnet spring migration and when S800115 may have headed back to or near to its place of birth.
I'm afraid that such recoveries often provide a few answers but inevitably throw up new questions. At least the bird is still in circulation and presents a small chance that should it be captured for a third time, more information on its travels may become known. This latest recovery fits into two previous recoveries and north/south movements to or from Gulf Lane.
Linnet from Shetland
Linnet to Lochinver
Linnet to Walney Bird Observatory Duration: 267 days Distance: 23 km Direction: 300deg (WNW)
Finder: Walney Bird Observatory, 9095
Sand Martin
On 23rd May 2018 we caught a French ringed Sand Martin at Cockerham Quarry.
Paris ringed Sand Martin
Sand Martin (Riparia riparia) - Ring no: 7193238
Ringing details- Age: 4 (adult) Ringing date: 10 August 2015
Site name: Hiers-Brouage, Charente-Maritime, France
Ringer: Paris, -11
Sand Martin
Hiers-Brouage to Cockerham
Ring number 7193238 was recaptured at Cockerham on 23 May 2018.
Duration: 1017 days Distance: 910 km Direction: 352deg (N)
Grotty weather again today, so nothing doing in the birding or ringing stakes.
Instead, here’s an interesting study on cats versus rats. Cat lovers and bird lovers rarely agree, but in this case it seems that pussy cats are not the ultimate rat catchers but prefer instead to eat a bird or a mouse.
Pussy Cat
Journal Reference:
Michael H. Parsons, Peter B. Banks, Michael A. Deutsch, Jason Munshi-South. Temporal and Space-Use Changes by Rats in Response to Predation by Feral Cats in an Urban Ecosystem - Frontiers in Ecology and Evolution, 2018.
"Like any prey, rats overestimate the risks of predation. In the presence of cats, they adjust their behaviour to make themselves less apparent and spend more time in burrows," says the study's lead researcher Dr. Michael H. Parsons, a visiting scholar at Fordham University. "This raises questions about whether releasing cats in the city to control rats is worth the risks cats pose to wildlife."
People have long associated cats as the natural enemy of rats. However Australian and US researchers say cats prefer smaller, defenceless prey such as birds and smaller native wildlife -- which makes cats a threat to urban ecosystems.
"New Yorkers often boast their rats 'aren't afraid of anything' and are the 'size of a cat'," says Parsons. "Yet cats are commonly released to control this relatively large, defensive and potentially dangerous prey."
Brown Rats
"Until now, no one has provided good data on the number of city rats killed by cats," adds co-author Michael A. Deutsch, from Arrow Exterminating Company. "But the data have been very clear as to the effect of cats on native wildlife."
When feral cats invaded a New York City waste recycling centre, the researchers took the opportunity to correct the record. Their team was already studying a colony of more than 100 rats living inside the centre, by microchipping and releasing the animals to study their life history. When the cats entered the research area, they set up motion-capture video cameras to quantify the effect of the cats on the rats -- the first time this has been studied in a natural setting.
"We wanted to know whether the number of cats present would influence the number of rats observed, and vice versa," says Parsons. "We were also interested whether the presence of cats had any effect on eight common rat behaviours or their direction of movement."
The researchers examined 306 videos taken over 79 days. Although up to three cats were active beside the rat colony each day, only 20 stalking events, three kill attempts and two successful kills were recorded in this time. Both kills took place when cats found rats in hiding; the third attempt was an open-floor chase where the cat lost interest.
The videos also revealed that in the presence of cats, the rats spent less time in the open and more time moving to shelter. "The presence of cats resulted in fewer rat sightings on the same or following day, while the presence of humans did not affect rat sightings," says Parsons. In contrast, the number of rats seen on a given day did not predict the number of cats seen on the following day.
"We already knew the average weight of the rats was 330 g, much more than a typical 15 gm bird or 30 gm mouse," says Parsons. "As such, we expected a low predation rate on the rats -- and our study confirmed this."
"We are not saying that cats will not predate city rats, only that conditions must be right for it to happen," adds Deutsch. "The cat must be hungry, have no alternative less-risky food source, and usually needs the element of surprise."
The findings could explain why people continue to release cats as "natural" rat control tools. "People see fewer rats and assume it's because the cats have killed them -- whereas it's actually due to the rats changing their behaviour," says Parsons.
"The results of our study suggest the benefits of releasing cats are far outweighed by the risks to wildlife," he adds. The research team plans to continue collecting data as part of their long-term study and will update their findings as new information becomes available.
Pussy Cat
"Much more research is needed to better understand the city rat problem, we hope our successes will compel others to perform similar studies in other venues," says Parsons.
But for now, in the battle of New York City cats and rats it appears the rats are winning.
Keen eyed readers will note how the header picture changed. I swopped the Glasson Dock Common Tern for a Skiathos Yellow Wagtail.
Yellow Wagtail (Motacilla flava) is familiar to British birders but throughout Europe there are many overlapping races and intergrades of Yellow Wagtail, whereby literally dozens of races and sub-species have been described. This makes identification and assignation difficult, especially at migration time in Central Europe in the case of juveniles like the one shown.
I'm thinking that the header bird, the one below, may be Motacilla flava beema, also known as Sykes’ Wagtail, especially since other Yellow Wagtails I saw fitted the same criteria. Yellow wag experts out there may wish to comment?
Yellow Wagtail
Otherwise, birding on Skiathos Island proved rather unexciting during very hot, clear weather and wall-to-wall sunshine – not the best conditions for dropping migrants onto an off-shore island. So I returned home with very few bird pictures.
We saw lots of Spotted Flycatchers, Whinchats, Yellow Wagtails, Red-rumped Swallows and Barn Swallows, together with Buzzards, Willow Warblers, Kingfishers and the inevitable Eleonora’s Falcons. Unlike other years Red-backed Shrikes were few and far between where by locals told of a long hot summer where a successful breeding season may have finished early.
Spotted Flycatcher
Red-backed Shrike
A developing storm on our last day saw thousands of Red-rumped Swallows overhead as they descended below cloud level to escape the incoming turbulence. We left Skitahos just in time because since we returned home Cyclone Zorba laid waste to a number of places on the Peloponnese mainland including parts of Athens.
There was a knock-on effect to Skiathos where we heard that tourists out to enjoy the last week of the Skiathos season have had a pretty raw deal from cloud, rain and wind.
Today, Sunday, from Skiathos. "The main road is closed at Acropolis, at Kolios and at Troulos due to flooding and water escaping from the mountain into the sea. Power disruptions due to the weather. 102 mm of rain today to add to the 53 mm of Saturday."
Nonetheless we asked the lovely Anna to reserve our room for next year as we have no reason to doubt the question of “Why Skiathos?”.
Why Skiathos?
Skiathos Town
No Name Gyros
Big Aselinos Beach
Skiathos
Skiathos donkey
Bourtzi Skiathos
Ouzo
Yes, we will be back. And very soon.
So will Another Bird Blog with more news, views and photos.
Boreas the Greek God who brings winter winds tried his best to stop us leaving Skiathos on Tuesday night and early Wednesday. But by Wednesday lunchtime he’d run out of puff but the leftover headwind meant the plane had a flying start and didn't need a refuel at Kavala as planned. Most unusually, Manchester was bathed in sunshine when we landed an hour early.
There was some catching up for me when I met Andy at Oakenclough on Friday morning where the temperature hovered around 6° rather than the accustomed 25° of Greece.
In two weeks of my absence Andy had dodged the rain and caught over 250 birds with the usual good mix of species including Bullfinch, Meadow Pipits and yet more Mistle Trushes.
It was a similar story today with 33 captures of 12 species, only one of which was a recapture from recent days - 8 Chaffinch, 6 Meadow Pipit, 6 Goldfinch, 2 Mistle Thrush, 2 Chiffchaff, 2 Blackcap, 2 Dunnock, 1 Treecreeper, 1 Goldcrest, 1 Great Tit, 1 Blue Tit and 1 Song Thrush.
We have discovered that we can catch Mistle Thrushes up here in the Pennines, more so in the autumn when the species is on the move and when small parties or single birds pass overhead or stop off at our ringing site. These birds may be the remnants of post-breeding flocks that disperse towards the coast or lowlands for the winter whereby we have seen up to 60-80 on occasions. Equally they may be pure migrants from further afield but it is impossible to be sure to which category an individual belongs.
The six of this week have all been of first year/juvenile age.
Mistle Thrush
Mistle Thrush
The single Song Thrush (a first year/juvenile) seemed to have some weakness in the feather structure of both wing and tails. The outer primary feathers were very worn and faded while the tips and ends of every tail feather had completely worn away.
Song Thrush
Song Thrush
Song Thrush
90% or more of the Meadow Pipits we catch in the autumn are first year/juveniles with their characteristic mix of juvenile and post-partial moult feathers. Below is a fine example of an adult wing in September; this adult has completed a full moult so that all of the coverts, secondaries, primaries and tertials are of the same age and colour. The whole wing looks uniform across its width as opposed to a first year wing with a mix of feather ages. Similarly, each tail feather is new and fresh as well as wide at and near the tips. The tail of a September juvenile/first year is straggly, thin, and worn with a much more pointed appearance.
Meadow Pipit - adult
Meadow Pipit
The morning was rather clear with a good number of birds passing high overhead. Mostly, and from their calls they appeared to be Chaffinches, as confirmed by Chaffinch being the most ringed bird of the morning. Otherwise we caught not a single Redpoll or Siskin, but 3 Linnets seen here is very unusual.
Chaffinch
Take a look at that pointy tail – another first year/juvenile female Blackcap.
Blackcap
Chiffchaffs have been so scarce this year that it was most pleasing to catch two this morning. Both juvenile/ first years.
Chiffchaff
Birding in-between ringing clocked up lingering summer visitors in the shape of 4 Swallows and a single Yellow Wagtail.
Otherwise, 8 Pied Wagtail, 2 Great-spotted Woodpecker, Jay, Nuthatch, 5 Cormorant, 40 + Lapwing and 300+ Greylag Geese on and around the nearby reservoir.
September means Skiathos where Sue and I join the Boomerang Club, people who return year after year to this very special Greek Island. Don't forget - click the pics.
Skiathos is the most popular of the Sporades, the group of islands east of Volos and north of Evia on mainland Greece. The island of Skiathos is actually an extension of wooded Mount Pelion 100 miles away on the mainland and the scenery reflects this. Skiathos is a green island with pine forests and abundant water with fig, olive, plum, and almond trees, as well as grapes.
Skiathos
Leaving Skopelos
Skiathos embraced tourism many years ago where on glistening beaches, wooded hillsides and in peaceful valleys are a number of the finest hotels in Greece. We stay in one such place that shall remain our secret.
Skiathos has much to offer people of all ages and nationalities from Northern climates seeking a blast of September sunshine. We find ourselves amongst fellow Brits, East Europeans, Finns, Danes, Norwegians and even the occasional German. Luckily we don’t do lying on the beach so the sunbed issue never arises, but the queue for the bus to lively Skiathos Town at 1800 hours can be problematical.
"Every September Skiathos holds the Katsonia Festival held in memory of the submarine Lambros Katsonis sunk on 14th September 1943 close to Kastro, the former capital of Skiathos located on the northern tip of the island."
Memorial to the sinking of Lambros Katsonis
"Whilst trying to intercept a German troop transport during World War Two, the Lambros Katsonis was sunk by the German submarine chaser UJ-2101. This tragic event resulted in the drowning of 32 crewmen, including the ship’s captain, as well as 15 other crew captured by the Germans.
Amazingly, three of the ship’s crew – Lt. Eleftherios Tsoukalas, the ship’s executive officer, and petty officers Antonios Antoniou and Anastasios Tsigros managed to swim to the shores of Skiathos, an epic feat which took them nine exhausting hours. They hid on the island until they eventually managed to return to Egypt and rejoin the Greek fleet.”
For beach lovers there are over 60 sandy beaches in Skiathos, including Koukounaries rated 7th best beach in the world and best in Greece. Banana Beach just around the headland is the island's only naturist beach, perhaps because it is more remote and very sheltered. Most of the beaches are easy to reach by bus or moped as they are generally alongside the only main road on the Island and reached by following a track or dirt road.
Ligaries or Kechria?
Jimnys
Skiathos
The remotest north-coast beaches like Ligaries, Mandraki and Ttsougria are accessible only by jeep, dirt-bike, foot or donkey.
We hire a Jimny jeep for our stay even though there is an excellent bus service that plies frequently between Skiathos Town and Koukounariés resort, 7.5 miles west. The buses call at 26 numbered stops where our own is Bus Stop 16, the small resort of Agia Paraskevi at the entrance to Platanias valley.
The often crowded bus, standing room only, is an essential Skiathos experience where the aromas of a day on the beach, mozzie cream, wasp deterrent and a meal of garlic mushrooms & tzatziki make for a heady experience.
Skiathos Bus
The Jimny is essential for exploring the more remote parts of the island where their remoteness involves often tortuous, bouncing progress over terrain badly rutted by winter storms that cascade off steep hillsides onto unmade tracks below.
Skiathos jeep
To Evagelistria
View from Kanapitsa
The success of the first Mamma Mia filmed in 2007 around neighbouring Skopelos created a sort of mass-hysteria when people who loved the movie travel to Skiathos looking for the island depicted in the film. The cultists may not find those actual scenes, rarely meet up with Meryl Streep, Pierce Brosnan or Donna, but are never disappointed.
Mamma Mia
In Skiathos Town cafes, gyro joints and tavernas line the sunny boulevard where pristine yachts shine in the everlasting sun. Goldie Hawn is rumoured to be a regular in Fresh Café, hot from her $30 million yacht moored off-shore. We can vouch for the coffee and the wedge of marbled cake that arrives with each order but we have yet to meet Goldie.
Skiathos
Eating out each evening without worrying about the washing up is something of a bonus. And it doesn't cost an arm and a leg.
Souvlakia
Taverna Maistrali
No Name Gyros - Skiathos Town
Skiathos is a beautiful island where the only drawback is the difficulty of arriving or leaving due to the airport's notoriously short runway and summer thunderstorms that emanate from the hot mainland. Delays and cancellations are the stuff of legend. Touch wood. We have experienced the spectacular thunderstorms that light up the night sky but not the resulting delays.
Skiathos Landing
The birding here is casual, an adjunct to the holiday of relaxation and the vibes of Greece. Yes, there are birds to be found, especially since I seem to be the only birder on the island. Just as we like it.
Woodchat Shrike
Eleonora's Falcon
Yellow Wagtail
Red-rumped Swallow
Red-backed Shrike
Spotted Flycatcher
Hobby - http://www.luontoportti.com
Honey Buzzard - http://www.luontoportti.com
Boomerangs
Come late September the island winds down from the hectic five months of tourism when many businesses close and their owners return to Volos, Thessaloniki and Athens for the winter.
Ferry to mainland Greece
Skiathos subsides into normal as those left on the island breathe a sigh of relief until it’s time to start all over in May of the following year.
Back soon in Blighty. Now watch the video for a real feeling of Skiathos.
