Thursday, 28 July 2016

Roost ringing and 2 French Sedgies

A control juvenile Swallow was among the 30 caught last night on the Teifi Marsh. It will be interesting to see where a bird with the ring from the series Z907 was ringed, obviously very recently.

We now have 4 trainees and with a keen Biology student home for the holidays from Oxford Uni as well it was good to be able to introduce some of them to roost ringing in the reed bed.

Every evening from about 20.30 the numbers of Hirundines over the marsh builds to several hundred. This month we have caught 65 Swallows and 1 Sand Martin.

(photo thanks to Dean)
Pied Wagtails come in to roost a bit earlier and 19 have been ringed so far this month.

As usual we are out ringing early every morning, weather permitting, to continue our long term monitoring of migration through the Teifi Marsh. Sedge Warbler numbers are increasing and a surprise earlier in the week was a French control. Although we catch several French ringed birds in Spring, it was our first in July but this year this was swiftly followed by another French control, this time with a Strasbourg not Paris ring.

Thursday, 7 July 2016

CES 7....a yearly comparison,

On July 7th 2013 I wrote...."CES 7 this year compared to last year.   45 new birds this year..31 last year.  18 retraps this year..28 last year
Only one piece of data, but supports the better breeding season this year following a poor breeding last year producing fewer birds to recapture. 14 new Chiffchaffs and 7 Reed Warbler recaptures too..."

This year during CES 7 we captured  52 new birds and only 13 retraps. A surprisingly  low proportion of retraps. The Totals of  CES 7 for 2010-2016 are at the end of the post.

We recaptured a male Redstart ringed during CES 5. Back in 2013 Redstart was a not a species that we caught annually, we now appear to have Redstarts breeding more locally. The photo is of a juvenile taken caught during CES 7 last year. Perhaps a trend shown in the latest BTO Breeding Bird Survey report just published.

The most numerous species caught was Chiffchaff, 15 new and 2 retrap.

Reed Warblers have always been a feature of our CES, 7 new and 4 retraps this session.
We have a RAS site nearby for Reed Warblers, but we are interested in the Reed Warbler data provided by CES too. This season we have caught over 132 Reed Warblers, nearly all adults so far. I have a feeling that the 49+ new adults is unusual for to do !

Two of our trainees Dai and Dean had the chance to learn how to fit colour-rings on Reed Buntings, another species we are studying, and attempting a RAS project. Two adults and a juvenile were caught.

A good proportion of our Reed Bunting recapture records are from photographers. Many thanks particularly to Tommy and Colin. Great to add a bit of Citizen Science to a visit to the Teifi Marshes Reserve.

Three new juvenile Treecreepers were the other highlight of this CES visit.

TOTALS for CES 7   New      Retrap
2010     45   23
2013 4518
2015 6815

Monday, 4 July 2016

More juvs and French controls

The first juvenile Sedge Warblers were ringed on the Teifi Marsh yesterday

Also the first juvenile Lesser Whitethroat and Cetti's Warbler.

Not an easy development for some young. Irregular feeding producing extreme growth bars in the feathers as this tail shows in one of today's juvenile Reed Warblers.

Although this is an old paper, the abstract does explain growth bars nicely.
Ptilochronology, Feather growth bars as indicators of nutritional status.

CES 6 was done last week with  just 48 birds caught compared to 82 on the equivalent CES last year.
The most interesting catch was a juvenile Willow Tit, caught with the adult that we ringed last week. As noted in a previous blog it would be nice to think that these are breeding on the reserve.
Other Tit species were notable by their absence, a different story on our garden feeders where Blue and Great Tit juveniles are present in large numbers.

Regular readers of the blog will remember that we caught a good number of Sedge Warblers on migration this Spring including 1 Belgian, 10 French and 4 UK controls. We have now had details from the BTO of another two of the French birds. Both ringed on Autumn migration last year.
FRP.7828959 was ringed in Sandouville, Seine Maritime on 6th August 2015.
FRP.7843214 was ringed in Mars-Ouest on 21st August 2015.
The latest two have been added to the map of other Spring 2016 Sedge Warbler controls already received. We are now just waiting for ringing details of 5 French and 1 Belgian controls.

We don't catch many Storm Petrels at Mwnt but last night 11 were caught, all new. This was our second highest catch at Mwnt. 13 on 1st July 2014 included 3 controls and a retrap.

Weather permitting, we are planning the next CES for Wednesday 6th July

Tuesday, 28 June 2016

Skokholm revisited

Another visit to Skokholm to help mainly with colour ringing Great Black-backed Gull chicks. This is part of the long term monitoring of survival and recruitment into the breeding population. The largest chick we ringed was already practicing stretching its wings and jumping.

This is one of the smaller chicks, back in its sheltered spot after ringing

and these were three from the same nest.

We were joined by Ieuan and Viola from the BTO who were out on the island with a group of Cardiff University students on their long running annual field course

Oystercatcher chicks were also colour ringed joining the Pembrokeshire Ringing Group wader study.

Once a year, a couple of hours are spent in Crab Bay mist-netting Puffins to top up up the colour ringed study population. Visitors to the island enjoy contributing to the study by looking for colour ringed birds in the study plot.

More about the Puffin ringing on The Skokholm Blog

We also caught some Passerines using mist nets, spring traps and running the Helgoland traps.  A lot of juvenile Wheatear were fledging around the island and a couple were ringed.

The wardens and volunteers were busy all week doing a whole island Storm Petrel Census, part of the 10 year national survey of the UK's breeding Storm Petrel population.  Vicky and Erin here using an endoscope to look into a Storm Petrel nest hole, though most of the surveying is using playbacks.

The count was featured on the BBC news website last week "Project to count Storm Petrels off Pembrokeshire Coast"

Cardiff University have been running a field course on Skokholm for many years, also held on Skomer for 3 years while the island was shut. The students spent the week doing various projects and gave interesting reports on their work at their end of course barbecue.

Some of them joined us catching Manx Shearwaters along the study transect at night.

Captures this year are averaging 50% retraps from previous years. Nice that the first Manxie we caught was one we ringed last June, back after its long journey to the South Atlantic.

Another very worthwhile week on Skokholm.
A stay on Skokholm is highly recommended. Ringers are welcome. See the Wildlife Trust of South and West Wales website for information
Staying on Skokholm

Meanwhile, Andrew, our trainee, was out on Skomer helping with the Manx Shearwater research.  Here is a young chick being weighed

 Back to the Teifi now and CES is planned for Thursday.

Saturday, 18 June 2016

CES 5 ....before we wander

We managed a very successful CES 5 despite some forecasts of less than helpful weather. 79 of 18  species were captured, including our first Long-tailed Tit party of the season...9 new and 4 retraps.
Highlights included new adult Lesser Whitethroat, Willow Tit and this moulting adult male Redstart.

Redstarts breed nearby and we catch the occasional wanderer. Lesser Whitethroats breed on the site in small numbers, and this was our 4th Willow Tit, although the first adult. Willow Tits are rarely recorded around the Teifi, we know they breed around 5 miles away at Ffynone wood, a site connected via a tributary of the Teifi.

Nice to think our CES Willow Tit was from a closer breeding site. Two new adult Reed Warblers added interest with another three returning birds caught for the first time this year, two from 2013. Cettis, Garden Warbler and this juvenile Treecreeper were new species for our two trainees present, Andrew and Dai.

As well as ringing on the Teifi Marsh we are continuing to ring in our gardens and at Mwnt. At Mwnt we are continuing our Linnet study as well as ringing some other species including Stonechats.

Juvenile Stonechat on the left and adult (age 5) male on the right.

This week at Mwnt we also ringed a few House Sparrows wandering to feed from the nearby farm. Juveniles of many species are now on the garden feeders including Goldfinch, Siskins, and Great Spotted Woodpeckers. Last month, Wendy was surprised to catch this Redstart in the garden.

It turns out that the nest must be very close as the fledglings were on the washing line this week !

No ringing planned in the coming week as two of us are going to Skokholm again and others are off on holidays.
Pictures Andrew, Charlie and Wendy

Sunday, 12 June 2016

Linnets, French Controls, returning birds and nesting.

This week we caught the first juvenile Linnets of the year at Mwnt

We are still catching new adults and it is looking possible that we could do a Linnet Retrapping Adults for Survival (RAS) study here over the coming years.

More returning Reed Warblers this week for our RAS on the Teifi Marsh. A couple of 2 shelf nets in the reed bed in the evenings have added a few so we are now up to 36 recaptures. One of the older Reed Warblers was  L250901, ringed as a juvenile on the marsh in August 2010 and not seen since 2013.

Regular readers of the blog will remember that we caught a good number Sedge Warblers on migration this Spring. As well as 596 new birds ringed so far this year there have been 1 Belgian, 10 French and 4 UK controls. We have now had details from the BTO of three of the French birds...

All were ringed in France on Autumn migration and caught by us as they returned to their breeding sites this Spring.
6950593 was ringed at Les Barthes-de-Quartier-Bas in the Pyrenees-Atlantiques in August 2014. Caught on the Teifi Marsh 623 days later on 30th April. This was our second control from here.

7516694 was ringed at Trunval, Treogat, Finistere on 31st July 2015. Our first control from Finistere
Caught on the Teifi Marsh 272 days later on the 28th April

7506166 was ringed at Tour aux Moutons, Donges, Loire Atlantique on 9th August 2015
Caught on the Teifi Marsh 263 days later. We have had 4 previous Sedge Warbler controls from Donges and they have recovered 7 of our Sedge Warblers there.

Karen has been busy ringing pulli...
For the first time, Redstarts have nested in 2 boxes in Pengelli Wood, a Wildlife Trust of South and West Wales reserve of which she is the voluntary warden. One healthy brood was ringed a week ago well fed by this adult.

These have a bit of growing to do.....

Unfortunately no Pied Flycatchers have nested in the boxes this year but plenty of Great Tits..

 and Blue Tits. We have noted comments from other ringers of Pied Flycatchers in particular, observing problems this breeding season.

Unusually one box was used by a Marsh Tit with 5 chicks.
Karen has also ringed some Dipper Pulli in The Gwaun Valley. Unfortunately the Dipper boxes have only produced one successful nest with 2 young fledged.

Stonechat and Meadow Pipit pulli have been ringed at Mwnt too, with some nest finding training by Chris.

We had hoped to do CES 5 today but for the first time in ages a rainy weekend has postponed that until later in the week.

Finally, our newest trainee Dean has written enthusiastically about the start of his ringing training with us.
Ystwyth Birder blog

Tuesday, 7 June 2016

Reed Warbler RAS, Storm Petrels, Chough and CES 4

The Group has been wandering to islands.......first though, our studies on the Teifi

This Saturday we captured 17 Reed Warblers across the CES and Pentood sites. All were retraps from previous years, the oldest ring from 2011. Our RAS season total is now 30 Reed Warblers and with another 15 from the CES site.
We caught our first juvenile Wrens, Chiffchaff, Dunnock, Song Thrush, and Chaffinch. Moulting adult Blue Tits and Great Tits gave us the opportunity to introduce moult scoring to our three new trainees.

Highlights included two Cetti's Warblers recaptures. This brings our site total for Cetti's to 14 this year,  (11 adult retraps and 3 new adults). Two new adult Lesser Whitethroats were our first for the year.

We tried our first Storm Petrel session of the year at Strumble Head after CES on Saturday. Great to start the season with an early successful catch with a couple Strumble sea-watchers joining us.

See the link below for Adrian's short piece on their visit.
Strumble Head Seawatching blog

Over a year ago our group were asked if we could help resume the monitoring of Chough on the RSPB reserve of Ramsey Island after a gap of 10 years.  This has turned out to be a fairly complicated process of co-ordinating the Schedule One licence (us), a team of RSPB accredited climbers (by Greg the reserve manager), and the Choughs' own breeding timetable (themselves) which meant that we were too late in the end to do anything last year. This year however, Chris and Ryan were able to colour-ring one brood of three at the most accessible site, which is a good start at least. Unfortunately the second brood that we had lined up was predated by a Raven earlier in the week.

Thanks to Annie Haycock for the photos

Wendy and I visited Skokholm Island Bird Observatory, where as well as general ringing nets, and 3 Helgoland Traps, we were also being trained in using special methods for catching breeding adult Oystercatchers and adult Great Black-backed Gulls.

The colour ringing of adults in addition to the young clearly advances this project forward. We will be returning to Skokholm in a couple of weeks to help colour ring this year's young.

We caught a few Spotted Flyctchers on our visit, a bird we rarely catch on our ringing sites, though we have ringed a few nests of Spotted Flycatcher pulli in our gardens.

Tonight - Tuesday we are planning to introduce a couple new members of the Group to Storm Petrel ringing at our Mwnt site, then we plan to catch more Linnets in the morning there too.