Wintering Blackcaps

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Even in my short time living here in Wales, I’ve noticed an increase in the number of Blackcaps spending the winter in our parks and gardens rather than making the relatively long flight to the south of the Iberian peninsula and northern parts of Africa.

This change in migratory behaviour is, no doubt, due in part to the changing climate, the warmer temperatures meaning locally bred birds can find enough food to survive, particularly in south-western Britain. As an article on the Bird Guides website points out, ‘since the end of the Second World War we have been creating a winter feast for Blackcaps by planting berry bushes in our parks and gardens and keeping our bird tables well stocked’.

Scientific research and ringing recoveries have also shown that many of the Blackcaps found in Britain in winter hail from parts of central Europe. (The BTO website has a pdf with a map showing the various directions of Blackcap migration and movement, to and from Britain, Europe and North Africa, and within Europe itself.)

In my local area I know of more than five Blackcaps that are spending the winter hereabouts, three of which I’ve seen and photographed (the first on 9 January, the second on the 19th and the third, the female, on the 30th) and two others that I’ve heard making their characteristic ticking sound but that I didn’t actually manage to locate in dense vegetation. I’m already looking forward to seeing more of these birds when those that did migrate further south return to our shores in the spring.

Barkfly: Ectopsocus briggsi agg.

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I wasn’t even aware of the existence of barkflies until a few years ago and I’ve not yet seen more than a handful of the 100 species to be found in Britain. Like most insects, they can be difficult to identify, and today’s little beastie is no exception. In fact, three species – Ectopsocus briggsi, E. petersi and E. meridionalis – have been lumped together into one aggregate name Ectopsocus briggsi agg. for recording purposes. I’ve seen these tiny (just 1.5 – 2mm) barkflies several times before this latest sighting on 30 January but I’ve not managed any good images before now.

Spring messengers

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Times have changed since Gilbert White noted 200 years ago that ‘the average first flowering [of Lesser celandines] around his Hampshire village of Selbourne was 21 February’ and even since Richard Mabey wrote Flora Britannica, published in 1996, as he has written that late February ‘is still the time celandines begin to bloom across much of southern England in a typical year’. Now, just 30 years later, the Lesser celandine plants growing here in south-east Wales have begun flowering in the past week, more than three weeks earlier than that previous average, and this despite the distinct lack of sunshine in recent weeks. Of course, I’m not complaining – these tiny bursts of yellow are the very best messengers of the Spring to come.

Kestrel 2026 : 86

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Probably due to the almost constant wet weather, I’ve not seen as many new bird species this January as I did in the previous two years. I imagine the storms also have something to do with this; though three named storms have hit the UK already this year, and caused enormous damage in the locations they’ve hit hardest, those storms have mostly passed us by here in south-east Wales. And though I’m not complaining about that, it is often stormy weather that brings the more unusual birds during the winter months.

This beautiful Kestrel was my most recent find. It was a complete surprise too, which is always a bonus. I’d been for a wander around the less muddy parts of Cosmeston Lakes Country Park and was walking through the area where there’s a dipping pond when I noticed the Kestrel sitting on top of a spindly tree. As you can see, it didn’t stay long but it was a joy to see.

Birch polypore

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It’s been a very long time since I blogged about this fascinating fungus, Birch polypore (Piptoporus betulinus), also known as Razorstrop fungus, because, as I explained in An essential piece of traveller’s kit (8 February 2016), barbers once used the hard surface of this fungus to sharpen their cut-throat razors.

Birch polypore is a rotter, literally; its powers of decomposition are strong, mostly acting on the wood of dead Birches (Betulinus species) but, as Pat O’Reilly writes in Fascinated by Fungi, it may also ‘be parasitic on weakened birches’. I found this lovely specimen feeding on a dead Birch in a Cardiff park earlier this week.

The Marl Med gull

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I’ve almost certainly shown you this exact same Mediterranean gull in previous posts (Med gull on The Marl, 16 February 2022, and Mediterranean gull,13 January 2025). Though Med gulls don’t breed locally, we are lucky to have one or two overwinter hereabouts, and this individual is regularly seen with the Black-headed gull flock feeding on a Cardiff park and recreation area called The Marl.

Although it’s not ringed, so we can’t be absolutely certain we local birders are seeing the same bird each time, it seems a high probability as birds frequently stick to regular habits and locations. Also, these gulls can live between 10 and 15 years, which lends weight to the idea that the same bird is returning each winter to an area where it’s been able to find food during previous winters.

And there’s one other factor that makes me think this is the same Med gull – it is a very confiding bird, so confident, in fact, that it’s always the closest amongst the flock of other gulls to any humans and the path around the park, which means you can sit on a park bench and enjoy good views of it as it goes about its daily search for worms and other insects.

Recording Grey squirrels

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At the start of each month my local biodiversity records centre chooses one species of flora or fauna to be the species of the month, in the hope that recorders will focus some of their recording time during the coming month in looking for and recording that species so as to fill in the gaps in their maps. This month the species has been the Grey squirrel (Sciurus carolinensis), a mammal so ubiquitous that you might think it would already have been recorded in every 1km square in south east Wales but no. As is reported on the SEWBReC website:

it is a species that can become overlooked due to being considered “too common to record”. It is important to record common species as well as rarities, to track population changes and other patterns over time.

Grey squirrels had already been recorded in most of the 1km squares in my area but I did manage to contribute a few additional records during the month.

Jimmy Wren

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I know Wrens are mostly referred to with the female vernacular name, Jenny Wren, but, from the way this handsome chap was belting out his melody, he was definitely a male advertising his territory and his attractiveness to any passing females. Hence, my title of Jimmy, not Jenny Wren.

I heard his song from the other side of the field, before I could even see him, which is quite common with these birds; small bird, big voice!

Millipede: Nanogona polydesmoides

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This is a new species for me and I’m not completely certain of my identification of this as Nanogona polydesmoides, a species of millipede, also known as the Eyed flat-backed millipede. However, on the Nature Spot website it’s been given a ‘green flag’, which indicates it’s easy to identify, and its appearance agrees with their description of it having ’rounded lobes on each side of the plates along its back, each with a short spine pointing backwards’.

The location in which I found this creature also agrees with the habitat details provided on the website: ‘Typically found in wet meadows and woodland where it lives in leaf litter and under logs’; I found this one in a small area of woodland, underneath a piece of bark that had fallen off a dying tree.

Mid-winter 10

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After a week of very cold temperatures earlier this month and what seems like almost constant wind and rain since then, our native flora have finally realised it’s winter and so it was a struggle to find any wildflowers in bloom this week.

I thought I was going to have to be content with the ‘Winter 9’ in the above image (which are Alexanders, Daisy, Dandelion, Gorse, Groundsel, Sea radish, Sweet violet, Winter heliotrope, and Yarrow) but then, during this morning’s walk, I spotted this Hogweed, bringing me to a total of 10, still quite a disappointing total compared to recent years.