Lifer: Scarce chaser

19 Thursday Jun 2025

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Here they are, the extremely confiding dragonflies mentioned in yesterday’s blog, the Scarce chasers (Libellula fulva) (also known as the Blue chaser). They were everything you could want in a photographer’s model, perching this way and that to show their best sides; not flying off at the slightest hint of movement behind the camera; the consummate professionals!

So, I managed to get photos of a male, female and the two together in cop. The female (above) is described in my guide book as having an olive-brown thorax and ochre-brown abdomen but, as you can see, she was much more vibrant than those descriptions suggest.

The males have a black thorax and blue abdomen with a dark tip. At a glance, with those colours, they could be mistaken for other dragonflies with similar colouration, until you see their eyes, which are the most amazing shade of blue. (In fact, I’ve just decided to add in a second photo of the male so you can get a better look at those eyes.)

I saw several of these dragons at RSPB Radipole Lakes in Weymouth, which left me wondering why they are called ‘Scarce’ chasers. It seems that, where they are found (in isolated spots in the east and south of England) their populations are relatively small, so they are officially designated as rare. Indeed, in the 2008 British Odonata Red List they were officially listed as ‘near threatened’, so I feel very privileged to have enjoyed such excellent views of these stunning creatures.

Lifer: Norfolk hawker

18 Wednesday Jun 2025

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My wildlife-watching hopes for my short break in Weymouth centred on butterflies and, perhaps, a few birds that I might not see locally, so it was a wonderful surprise to see two new dragonfly species, one extremely confiding (it’ll feature in tomorrow’s blog), one elusive to the point of frustration.

The Norfolk hawker (Aeshna isoceles) was the latter and, on my first visit to the RSPB Radipole reserve, the few times I spotted these dragonflies (easily recognisable by their brown colouring and green eyes), they stayed mostly hidden, perching – when they did actually stop flying – in obscure locations, as you can see from the photos above and below.

Finally, on my last afternoon, when there were fewer people out walking after a morning’s heavy rain and I was battling my way through the extremely overgrown vegetation along the path to the northern bird hide, one of these stunning dragons posed perfectly for me.

Although called Norfolk hawkers, these medium-sized dragonflies have been expanding their range beyond the English county of Norfolk. Their preference for reed beds in swamps and ponds, along streams and ditches, means Radipole provides the perfect location for them to thrive.

Breeding Common terns

17 Tuesday Jun 2025

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My afternoon walk to Lodmoor Nature Reserve proved the perfect antidote to my five-hour journey on four different trains to get to Weymouth. And what an absolute delight it was when I arrived at Lodmoor to first hear – very raucous, and then see the Common terns and their Black-headed gull companions breeding in close proximity on two artificial islands near the edge of the lakes. (These islands are ring-fenced and fitted out with some enclosed nesting ‘boxes’ to try to offer the birds better protection during the breeding season.)

Though Common terns can be seen at certain times of year when moving on passage up and down the Bristol Channel, I’ve rarely managed to catch sight of them in my local stomping ground, so seeing them at reasonably close quarters, and with their tiny chicks just beginning to explore the world around them, was another special treat of this holiday.

Terns are magnificent aeronauts. Their skill at manoeuvring their streamlined shape through the thermal airwaves, their ability to twist and turn and plunge and lift – these fliers are a joy to watch, particularly when diving for the tiny fish swimming just below the water’s surface. And, with several tiny chicks to feed, these terns were almost constantly in the air. Many seemed to fly straight out to sea where, presumably, their prey was more bountiful but I also noticed, when walking around Weymouth’s other local nature reserve, Radipole Lakes, that the Common terns were successfully exploiting the fishing opportunities there as well.

Lifer: Lulworth skipper

16 Monday Jun 2025

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This was another new-to-me butterfly, the Lulworth skipper (Thymelicus acteon), and this was the butterfly that I really hoped to see during my visit to Weymouth. Clearly, I was not disappointed.

This was another find in the sculpture park that is Tout Quarry on the Isle of Portland, and I saw my first Lulworth skipper almost as soon as I arrived. At first glance, they could easily be mistaken for Small skippers, but Lulworths are slightly smaller and generally darker, often turning an olive-brown colour as they age. The females also have a series of golden marks that form a notable circle on their wings, though that didn’t help me. As is common amongst butterfly species, the males emerge first, and I saw no females.

However, by sheer good luck, I also spotted my first Small skipper of the year as I explored Tout Quarry, which proved a very good comparison for the Lulworths I was seeing. I’ve included a photo of the two species below; this is not precise as to their size relationship but does, hopefully, give some idea of their colour differences (Lulworth on the left, Small skipper on the right).

The Lulworth skipper is named after the Dorset town of Lulworth, where it was first found in 1832. Though these butterflies have expended their range a little in the intervening 190 years, they are still only found in locations along the south Dorset coast. I had expected to have to catch a bus to Lulworth until I read the butterflies could be found on Portland, and I booked my little break away as soon as I heard they were on the wing. So, it was a real treat to find them so quickly and easily, and then to spend perhaps 90 minutes in the quarry, enjoying all the butterfly species, the local plants, and, yes, I did also look at the stone sculptures.

Portland spurge

15 Sunday Jun 2025

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From its structure I knew this wonderfully sunny plant was a Euphorbia, a member of the Spurge family, as soon as I saw it, but I had no idea until I researched it later that the Isle of Portland had its very own species.

This is Portland spurge (Euphorbia portlandica), a close relative of Sea spurge (Euphorbia paralias) but with some subtle differences in the shape of its leaves: Sea spurge has thick fleshy leaves, whereas those of Portland spurge are thinner, with more pointy tips. Unfortunately, I wasn’t aware of that until later so the leaves are rather obscured in my photographs. I was just delighted by the joyous colour of Portland’s flowers, so appropriate for this seaside location.

Portland spurge is not confined to the Isle of Portland; it can also be found growing on dune sands and coastal sea cliffs around the south and west of Britain and Ireland.

Lifer: Silver-studded blue

14 Saturday Jun 2025

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I’ve just returned from four wonderful nights in Weymouth, on England’s south coast, my days full of walking and wildlife. I may see a lot of wildlife where I live but part of the reason for my recent house move was so that I could afford to have a few short breaks away to explore new areas and see different wildlife while I still have the energy and mobility to do that, and also while being as low-carbon as possible in the process, of course, so travelling by train and/or bus and with a lot of walking as well. So, there will be a few blogs in the next week or so, covering some of the things I saw while away.

First up, in an old disused quarry on the Isle of Portland, were my first ever Silver-studded blue butterflies (Plebejus argus). The ‘silver-studded’ part of the name comes from the way the light is reflected off the light blue scales on the underside of the adults’ hindwings, making them shimmer like silver. And the ‘argus‘ epithet in its scientific name is a nod to the multi-eyed shepherd of Greek mythology, a reference to the spots on the undersides of the wings.

Silver-studded blues are rare and only seen in a few isolated areas around the southern coast of England, in Pembrokeshire and around the Great Orme in Wales, and in a couple of coastal locations in Norfolk and Suffolk. From those locations, you can perhaps guess that they prefer heathland, sand-dune systems and limestone grassland, in particular sheltered sunny spots where their companions, the black Lasius ant species, thrive. As is seen in several butterfly species, ants provide the butterflies with protection from insect predators throughout their life cycle.

Tout quarry provides the perfect environment for the Silver-studded blues. Quarrying has hollowed out large areas of ground, making it a sun trap and leaving stony areas where specialist wildflower species have managed to seed and flourish, though the vegetation does have to be managed to ensure the more aggressive plant species don’t overwhelm large areas of ground.

I was extremely lucky with the timing of my trip as these butterflies had only just emerged in the few days prior to my arrival, and that’s why I only saw the vibrant blue male butterflies; the females are brown on both the upper- and undersides of their wings. To see them is the perfect incentive for a return trip!

Destructive Woodpigeons

13 Friday Jun 2025

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Although I am officially on the ground floor in my new home, the site slopes quite steeply so my flat is actually on the middle of three levels and, from my windows, I look out over the small slice of ancient woodland that’s adjacent to this property at the level of the tree tops. This is perfect for watching the antics of the local bird life, from the several species of tits to the larger Carrion crows and Woodpigeons, and I’m noticing behaviour that I couldn’t previously see from ground level.

The Woodpigeons, of which there are many, spend quite a lot of time in the Ash trees. Looking through my binoculars, I’ve noticed that they appear to be carefully inspecting the leaves before pecking at them. Though they are predominantly vegetarian, they are known to eat some small invertebrates so, initially, I thought they were picking off aphids from the leaves. In the process they peck off chunks of leaf matter, which actually causes quite a lot of damage to the foliage. I have now read that they are actually eating the Ash leaves, targeting, in particular the shoots and younger leaves, presumably because those have the most nutrients. This feeding behaviour is really quite destructive – you can see the leaf damage to the right of this pigeon’s head in my photos, and something I was completely unaware of until I moved.

Five big hovers

12 Thursday Jun 2025

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I’ve come to the conclusion, rightly or wrongly, that large hoverflies are like buses: you don’t see any at all and then they all come along at once. At least that has been my recent experience (it’s probably more to do with the weather and the time of year, but I like my buses theory). The five big beasties shown here were all seen over just four days, between 29 May and 1 June.

With its black-and-yellow striping, it’s easy to see that Chrysotoxum cautum is one of the wasp-mimicking hoverflies. The eight British species of Chrysotoxum all have quite long antennae, and it is the relative lengths of the segments of those antennae that are used to differentiate between the five most similar species.

Merodon equestris comes in a variety of colour forms, each of which mimics bumblebees. The one pictured above is a rather worn specimen of form validus, which has a totally dark thorax and a grey-buff coloured bottom.

These final three are all members of the Volucellini, of which there are five British species. Like Merodon equestris, Volucella bombylans is a bumblebee mimic; which bumblebee it is attempting to mimic depends on which of the colour variations you see. This yellow-and-black form mimics Bombus lucorum, the White-tailed bumblebee, but there is also a mostly black, orange-bottomed variation of Volucella bombylans that mimics Bombus lapidarius, the Red-tailed bumblebee.

I was particularly pleased to see Volucella inflata as I’ve only found it once before. With its vivid and very distinctive markings, its round body, and protruding yellow snout, it’s a stunning hoverfly to encounter. Sadly for those of you in northern Britain, it’s mostly found in the southern counties and south Wales.

Volucella pellucens, on the other hand, is common and abundant throughout Britain, often seen hovering around head height along woodland rides and forest tracks. Due to its black-and-white colouring, it’s also known as the Great pied hoverfly.

Spider: Pardosa species

11 Wednesday Jun 2025

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Does it look like a wolf? Then why is this one of the so-called wolf spiders? I presume it’s because the Lycosidae or wolf spiders don’t use webs to catch their prey, relying instead on their running speed and superb eyesight (they have 8 eyes lined up in 2 rows) to catch their food.

There are nine genera of wolf spiders, and the spiders shown here belong to one of 15 British species in the Pardosa genus. I cannot be more precise about the name because this is yet another family where identification is difficult; my guide book states that ‘even with the use of a microscope, identification can be extremely difficult’, so I’m just glad I managed to get the fact that these are Pardosa species verified.

All the Pardosa are brownish in colour, with similar markings on their abdomens in lighter and darker hues. As you can perhaps make out in my photos, even though these are all the same species, the markings are different in each spider. As you may also have gathered from looking at my photos, the females in this family carry their egg sacs around with them, presumably to protect them. Those sacs are usually a blue-green colour, with a paler seam down the centre.

If you want to see more of the spiders in this family, check out Steven Falk’s amazing album of photos on Flikr.

Rhabdomiris striatellus

10 Tuesday Jun 2025

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Here’s another bug that I’d never seen before this year and I’ve been lucky enough to find both a nymph and an adult. This is Rhabdomiris striatellus, one of the UK’s 200-plus species of plant bugs in the Miridae family. (I’ve probably only seen about a tenth of them so I’ve got plenty more discoveries yet to make.)

As this bug’s larvae feed on unripe catkins, it is usually found on or around Oak trees, and that’s certainly where I found the adult bug, shown below. The nymph above had probably fallen out of an Oak tree, or had decided to go walkabout to find a neighbouring Oak; I found it on the railings of my local park, where I’ve found so many invertebrates.

Rhabdomiris striatellus overwinters as an egg, hatches out in mid Spring, then passes through a series of instars until it reaches adulthood. The adults can then be seen from May through to July. Those timings certainly fit with my discoveries; I found the nymph on 25 April and the adult, in a different location, on 3 May.