Spanish Black-head and record Cormorant numbers

Mullion Island Cormorants are already well into their breeding season now, with some chicks almost ready to fledge. Our regular count from photos found a reciord 75 nests across the front of the island, beating the 73 nests in 2021 and 72 in 1999.

Annoyingly, photographs also showed an interloper in the colony. This white- (or blue-) ringed bird is likely to be from Wales or Ireland, but without being able to read the ring we'll never know. We're currently investigating the options for remote pan-tilt-zoom cameras, so watch this space.

The highlight from this weekend was a great sighting by Shaun Grose at Hayle. This Black-headed Gull (black ring N016) is actually the first Spanish-ringed bird to be seen in Cornwall, so quite special. In fact only 30 have ever been seen in the UK, so even at a national level this is notable.

It was ringed as an adult on the north coast of Spain in January 2022 and was regular there until 11th March 2022, then seen again in March 2023. It returned in January 2024 and was last seen there on 26th February, before being seen at Hayle. Presumably it's breeding somewhere in the UK, so one to look out for in future years.

Winter is here and the gulls are coming

 It's always a good sign that winter must be here when we start seeing returning gulls from elsewhere. We know these aren't local birds as many are ringed, so it's just a case of getting out there and reading some rings and colour rings.

Yellow 2PRB was ringed as an adult at Pitsea Landfill, Essex in March 2016
and this is the third winter it's been seen in Cornwall

In just a couple of days this week, we've managed to read several metal rings and also seen some regular colour-ringed birds at Swanpool, Mylor Creek and Stithians Reservoir. The map below shows where some of the British-ringed birds originate from, most of which were ringed as chicks (from as long ago as 2013). We also recorded a bird ringed as an adult in Dorset in 2011, but still have a long way to go to beat the national longevity record of 32 years!

We're also waiting on details of a Belgian-ringed bird which will add another nice dot to the map, along with the regular Danish-ringed bird at Helston Boating Lake. So if you are lucky enough to see a common-or-garden gull wearing a colour ring do get in touch!

Danish-ringed White 8LZ at Helston Boating Lake

Ring-reading weather

Well 2016 seems to be getting off on the same foot as the back end of 2015, with yet more wind and rain meaning there's not a lot of mist-netting to be done. But there are still gulls to catch and, just as importantly, rings to read.

So a few of us have been out staring at gulls and waders again, catching up with some old colour-ringed friends, and the last week has seen birds from all over Europe resighted. We've seen Black-headed Gulls from Belgium and Poland (no fewer than three!) and also a 20-year-old bird ringed locally, Med Gulls from Belgium, Ireland and France, a Herring Gull from the Channel Islands (seen previously at Dungeness, Kent), a Black-tailed Godwit from Hampshire and a Curlew from The Netherlands.

Sadly none of my photos are any good, but a couple of the Polish Black-headed Gulls at Par Beach Pool were also photographed by Allan and Iain Stewart, so thanks to them for these.

23D8 returns

It's that time of year when we should be out catching migrants, but it's also the time of year when the weather is never calm enough to open nets. So it's also the time to await the arrival of some of our returning winter birds, including some real creatures of habit. One such regular is 23D8 that we've blogged about before (see here).

Breeding in its natal colony at Hosehill Lake, Berkshire, 23D8 is a regular winter visitor to Helston Boating Lake, but in recent years has paused briefly on the Camel estuary en route to Helston. This winter it arrived back bang on cue on 24th October, and for once we thought it had slipped through the Camel estuary unnoticed, but having just heard back from the ringer, that's apparently not the case!

23D8, third from the right (honestly!), back on bread-stealing duty

Over the last few years, 23D8's movements can be summarised as...

• last seen in Berkshire June 2012
• Camel estuary 4th October 2012
• Helston Boating Lake 21st October 2012 (to 1st March 2013)
• back in Berkshire by 19th March 2013 (last seen 2nd July 2013)
• Camel estuary 22nd July 2013 (and again 24th August)
• Helston Boating Lake 17th October 2013 (to 16th February 2014)
• back in Berkshire 9th March 2014 (last seen 4th June 2014)
• Camel estuary 23rd June 2014 (and again 3rd October 2014)
• Helston Boating Lake 24th October 2014

Pretty much the only other ringing we've managed recently was this very rusty rehabilitated Tawny Owl ringed at the Screech Owl Sanctuary last week. This is part of a long-term project monitoring the success of their rehab programme.

Good old reliable 23D8

With the wind still too gusty for much, all I could manage was a quick walk round the boating lake at Helston yesterday whilst putting off Christmas shopping. Ignoring the temptation of some very catchable Coot and Tufted Duck, the only ringed bird there was the regular 23D8.

Ringed as a chick in Berkshire in 2011, 23D8 spent its first winter on the boating lake in Helston before being seen back in Berkshire in June 2012. It then got into a pattern, being seen on the Camel estuary in early October before moving on to Helston in late October. Last seen at Helston on 1st March, 12 days later it was back in Berkshire for the summer. It made an equally sharp exit, last seen in Berkshire on 2nd July and then again on the Camel estuary 20 days later, before returning to Helston in late October.

I've now seen it several times at the boating lake, so it'll be interesting to see if it's here again all winter. So if you're passing, drop in and have a look for 23D8 and don't forget to report it!

More colour-ringed gulls

The weather is looking a bit more promising for the weekend, so hopefully we'll have some ringing news of our own shortly... But in the absence of calm days, there's always the fall-back of looking at gulls! After misjudging the tide at Hayle estuary yesterday, Copperhouse Creek was my only option, and I was greeted by this rather sleepy-looking Norwegian Black-headed Gull.

J4U4 was ringed as a chick back in 1991 near Stavanger (Norway) so is a very impressive 22 years old! It has been seen at Radipole Lake (Dorset) in February 2005 and was then recaught and colour-ringed as a breeding bird in Norway in April 2012, which then guaranteed a few more sightings. It bred locally in Norway in 2012 and was then not seen until January 2013 when it was on Hayle estuary. It was seen again in February before returning again in October 2013 and still there yesterday, so it'll be interesting to see if it's a regular wintering bird in Cornwall.

J4U4 in breeding plumage in Norway in May 2012

Interestingly, most birds from this Norwegain study head to Scotland and northern England, so a regular Cornish bird is very unusual.

This map shows the finding locations of birds from the Norwegian study,
showing how exceptional J4U4 is in its choice of wintering site.

A quick stop at Stithians Reservoir then also reunited me with a bird we'd ringed in Falmouth over the summer: W:032. It had been seen at the reservoir a couple of times already, but nice to catch up with one of your own birds away from home!

Thanks to Nils Helge Lorentzen for providing the details on the Norwegian bird so quickly, but note that these can now also be reported online here, with details instantly available! Thanks also to Alf Tore Mjøs for letting me steal his photo of J4U4 in full summer attire.