Category Archives: Wildlife

Conservation, Environment, Natural History, Wildlife

Clouds of Butterflies … in London

16 July 2015 Ian Alexander

Well, what an exciting day in nature. In London, too. The meadows are now as dry as we’ve ever seen them; and they’re full of butterflies. The Small Skippers have flown; in their place are plenty of Essex Skippers, on an increasing amount of Ragwort.

They are accompanied by clouds of Gatekeepers: we must have seen 100 of them, with 35 counted on one leg of the Butterfly Transect alone (going along to the beehive behind the Anthill Meadow). And good numbers of Meadow Browns (a dozen or so) and Small Whites; with twenty or thirty Holly Blues, they were high in the woods, visiting leaves, even on the ground.

A male Sparrowhawk perched on a dead branch above the pond boardwalk.

Signs of drought were everywhere: the pond is really low, but the brief rains of the last few days have brought levels back up a little. We spend a while giving 7 barrowloads of water to the planted birches on the embankment, and even rescued a few small oaks that were really suffering. The holm oaks, from the Mediterranean maquis, however looked perfectly comfortable: presumably with their waxy leaves and closed stomata, they are barely growing in the dry season.

Girl power: fixing a batten for trellis on green hut

We fixed up a trellis on battens bolted to the extremely hard steel of the green hut; it took forever to pierce the metal, but after that it was easy to do up the bolts and screw the trellis to the battens.

And yes, the butterfly transect was crowned by a confirmed sighting of an insect we’d felt sure must be here: a Purple Hairstreak. One sat on a low-hanging Oak leaf for us to check with binoculars and shaky camera. The streaked wings with their tiny tails could not be mistaken. The conservation officer was … visibly pleased. We also saw what seems to have been a Beautiful Carpet Moth – again, the photo was distant but we all saw it with binoculars.

It was hot and humid, and we worked quite hard, but it was a beautiful and memorable day.

Conservation, Love of Nature, Wildlife

Birds, Bugs, Blooms in Bornholm (Denmark)

11 July 2015 Ian Alexander

Mason Wasp Odynerus spinipes (Eumenidae) on aphid-sticky leaves — Mason Wasp *Odynerus spinipes* (Eumenidae) on aphid-sticky leaves

Three unlucky Dor Beetles on cycle track

Bornholm is in some ways as Britain was half a century ago or more: there are still swathes of cornflowers and poppies, though many of the fields are plainly weed-free except for narrow margins. The sky over arable fields and set-aside is loud with the song of skylarks; the hedges are full of the cheerful little-bit-of-bread-and-no-CHEESE song of yellowhammers. Swallows race in numbers low over the corn; the towns are busy with house sparrows, swifts and house martins, the many handsome old houses and churches offering plentiful nesting places to suit all parties. The woods held good numbers of blackcap, with willow warblers in the more open areas, a chiffchaff or two, plenty of whitethroats in scattered bushes, a garden warbler or two.

Some things are simply modern, despite the unspoiled rural look of the island: butterflies seem to be few – red admirals, speckled woods, peacocks, small tortoiseshells, meadow browns, and what I think was a fritillary over a marsh-fringed lake – it was quite big and fairly pale, roughly like a dark green: perhaps it was a marsh fritillary, but I couldn’t stay to find out. It was somewhat windy all week, so perhaps there are many more species on windless days, but I rather doubt it (and wind does seem rather usual on the island).

Of course in many ways it is quite different. The presence of eider ducks and goosanders in numbers on the (brackish) Baltic Sea, along with the occasional mute swan and mallard (and a less surprising shelduck), is strikingly unfamiliar. The crows, as in Scotland, are a reminder that this is the North: handsome grey-mantled hooded crows instead of their all-black carrion crow cousins; and there are rooks in numbers all over, including in the villages, boldly scavenging.

Natural History, Natural Patterns, Wildlife

Wetland Centre Bugs

3 July 2015 Ian Alexander

Dabchick in glorious dress, with wiggly reflections — Dabchick, with wiggly reflections

I wasn’t really birding but it was nice to see a little cloud of House Martins flycatching, and a richly dressed Dabchick diving for food.

Foamy wisps of scented Meadowsweet flowers were visited by honeybees; a Strangalia maculata longhorn beetle (it doesn’t have an English name, but it’s not the one usually called Wasp Beetle) clambered slowly over the flowerheads. It looks reasonably wasplike, if not terribly convincingly; it would be interesting to know if it is itself foul-tasting and hence actually aposematic, or just hitching a free ride through Batesian mimicry.

Strangalia maculata, a waspish longhorn beetle, on Meadowsweet

The Wetland Centre was very sunny, a little windy for butterflies (only Small Skipper, Red Admiral and Green-Veined White) but with the bees buzzing around the many flowers, very attractive. Several Orchids were in bloom, including purple and pyramidal. Even the different bindweeds looked wonderful. A pair of Mute Swans rested calmly with a cygnet or two at the bronze feet of Sir Peter Scott.

The dragonflies included one Black-tailed Skimmer, sunning itself on a “wildside” path; several blue hawkers, probably Hairy Dragonflies; an Emperor; a teneral darter, probably Common Darter; masses of blue damselflies – all the ones I managed to check were Azure Damselfly; and a few Common Bluetail damselflies.

Immature male Common Bluetail damselfly

Natural History, Wildlife

Small Skipper, Migrant Hawker and more at Gunnersbury Triangle

18 June 2015 Ian Alexander

We had a lovely day down the reserve in the warm sunshine with a gentle breeze. We dug out an unwanted post with extreme use of pickaxe, crowbar and shovel, and thus refreshed did the butterfly transect. It found a Red Admiral, some Speckled Woods, wonder of wonders a Small Skipper (the second Skipper species this week), a Meadow Brown (not common here), and a Green-Veined White. Not a bad haul. And a lot of Peacock caterpillars, if those count!

Eat me if you dare - Aposematic caterpillars of Peacock Butterfly — Eat me if you dare – Aposematic caterpillars of Peacock Butterfly

Neuropteran (Lacewing) larva – note the forceps-like mandibles

'Marmalade' Hoverfly dorsal view — Macrophya sawfly dorsal view

Conservation, Love of Nature, Wildlife

Large Skipper and Ichneumon in Gunnersbury Triangle

16 June 2015 Ian Alexander

Down at the reserve today, the first Skipper of the year, basking on a reed by the pond (with Azure and Large Red Damselflies too). It must be a Large Skipper from its size and pattern: uncommon in the reserve.

Up on the ramp, a Red Admiral; and this Ichneumon wasp, which looks very much like Gasteruption jaculator, a fine parasitoid with an ovipositor as long as her head, thorax and abdomen together. She was inside the hut trying to escape through the window; she is black all over, except for the front of her abdomen which is red, and the tip of her ovipositor, which is white. Her wings are nearly transparent with a hint of brown.

Ichneumon wasp Gasteruption jaculator, probably — Ichneumon wasp Gasteruption jaculator

We spent the morning fixing path edgings – poles of elm, with handmade wooden pegs, sharpened to stakes. A foreign couple came along and asked if we were preparing for Vampires: perhaps they were from Transylvania, who knows.

In the afternoon we repaired the gaps in the fence where vandals have started jumping over and running down the bank. We hammered in an enormous metpost with a tall square oak post – we had to bring the stepladder to reach the top to drive it in with the round post-hammer – and we had to shave off the edges so the hammer fitted over the post! Then we twisted wire supports and barbed wire to repair the gaps, and hammered extra-large staples into the posts to fix the wire. It was hot and hard work but we’ve fixed a definite problem. Happily the rest of the fence has become totally overgrown with brambles and bindweed, with leafy branches reaching down to it, so it seems unlikely anyone will climb over it there.

Love of Nature, Natural History, Wildlife

Hot Summer’s Day Insects

11 June 2015 Ian Alexander

Rose Chafer Beetle on Hogweed, dorsal view

On this lovely hot day, we tried to work, hammering in pegs to fix path edging poles. When we were all a bit dizzy from the heat and effort, we gave up swinging the sledgehammer and had a tea in the hut. Then we did a butterfly transect, which in the absence of anything but Speckled Woods, turned into a nature walk as we photographed all the other interesting insects. The Rose Chafer (on hogweed) is worth looking at full-screen as it’s very pretty.

A brown Shield Bug cf Coreus on Hogweed — A brown Shield Bug cf Coreus

Hoverfly Leuzozona leucorum — Hoverfly Leucozona leucorum

Array of Aphids on translucent Sycamore leaves

These aphids looked amazing with the sunlight streaming through the leaves; the leaves below were spattered with sticky sugar dropped by the aphids.

There was a beautiful Click Beetle too (like Athous haemorrhoidalis) but I didn’t photograph it as we were having too much fun making it go click and jump out of our hands.

See the Red damselfly? Look up: there’s a pair of Azure damselflies hovering above. Well worth viewing full screen.

We were pleased (and somewhat surprised) to find a family of Great Tits in box 10, right beside the path, and not terribly high up either, but it was an old and presumably proven nest-site, and so it has proven again this year. I got a blurry photo of one of the proud parents entering the hole, which I had repaired with some aluminium sheet this winter.

Ovipositing pair of Azure Damselflies; female is the green morph

I was very pleased with this photo, with its surreal light and bubbles. I’ve not remarked the green female morph before: most Azure females seem to be a paler, more lime-green form.

China Mark Moth laying eggs on pond weeds — Brown China Mark Moth laying eggs on pondweeds

This last photo (taken at quite a distance) shows something very curious: the Brown China Mark, a micro moth that lays its eggs on pondweeds, scurrying over the surface of the water searching for suitable ovipositing sites. In the dazzling light, she was far more reflective than anything else, and I had to turn the exposure down two whole stops to get her about right. The larva is aquatic, feeding on pondweeds.

Not pictured: sawflies; a swift Ichneumon beside the pond (without a long ovipositor, but with a clearly clubbed abdomen); many bumblebees and striped hoverflies. Nests of Peacock butterfly caterpillars too.

Nature Reserves, Wildlife

Insects in Gunnersbury Triangle

28 May 2015 Ian Alexander

Hoverfly, picked out by a sunbeam in the woods

Sawfly Macrophya on Hogweed — Sawfly Macrophya (Tenthredinidae) on Hogweed

Cuckoo Bee Corioxys — Cuckoo Bee Coelioxys (Megachilinae)

Conservation, Nature Reserves, Wildlife

Digging a ditch

Image 2 April 2015 Ian Alexander

Newly dug ditches … turning into a seasonal pond

After just three short sessions of ditch-making, we have a little network of waterways, an island sporting a natural tuft of Pendulous Sedge, some impressively high banks of muddy, gravelly spoil, and a new feature for the reserve. We hope to extend the ditch down the natural line (was it a ditch before?) to the trees at the end. The existing seasonal pond certainly had a ditch-like extension to just across the path (from where the lower photo was taken), and we intend also to clear that out – it shouldn’t be difficult as, unlike the current ditchworks, there are no stones, roots or ivy entanglements to cut through.

Today (7 April) the sun shone in a cloudless spring sky, and we worked to the song of a Chiffchaff. Two Blackcaps were singing elsewhere in the reserve, along with Wrens, Dunnocks, Great Tits, Blue Tits and some non-vocal Magpies, a Jay, Wood Pigeons, a Heron and Mallard. The insects, too, have emerged to exploit the sudden warmth, with plenty of Peacock butterflies, a Brimstone or two, and a Holly Blue; I saw a Small White in my garden. There was a 7-spot and a Harlequin ladybird, and the pond was alive with a new crop of Pond Skaters.

The grass is racing up; Broom is coming into its handsome yellow pea-flowers; several tufts of garden-escape Mahonia and Daffodils are richly yellow; red deadnettles tempt several species of bumblebee including buff/white-tailed and carders, and the honeybees are active.

Nature Reserves, Wildlife

Wood Mouse at Gunnersbury Triangle

Image 27 March 2015 Ian Alexander

A bold Woodmouse in the spring sunshine — A bold wood mouse, Apodemus sylvaticus, in the spring sunshine

Conservation, Natural History, Nature Reserves, Wildlife

Animal Tracks in the Snow

3 February 2015 Ian Alexander

Animal tracks: Fox, Crow, and Squirrel prints on a snowy boardwalk

Today we woke to a snow-covered city, just a light dusting; and as often with snow, the weather was appreciably warmer than before the snow arrived.

Down at the nature reserve, the paths were empty of human footprints, but thickly sprinkled with animal tracks. Here some crows had walked to and fro across the path; there, a fox had jogged along the trail. But better was to come: the boardwalk across the pond was interlaced with tracks. On the left, a fox had gone the length of the boardwalk. In the centre, a crow had walked unsteadily along, the same way as me; and it, or another, had walked more rapidly back. On the right, more birds’ footprints: and the four-feet-together group of a squirrel, the smaller front prints clearly showing the marks of the sharp claws.

On a Birch branch above the anthill meadow, a Green Woodpecker hammered in search of food. Down by the ‘mangrove swamp’, a Jay screeched harshly, either for us or for a fox. Near the picnic meadow, a Sparrowhawk flew from its high perch, wheeled above the treetops, dived rapidly out of sight.

We carried tools and a ladder to visit the nestboxes and take down all that needed repairs. While I held the ladder, a party of four Long-Tailed Tits blew by, crossing from one Birch to the next one at a time. One of the boxes contained not just a mossy nest (like three others) but two old addled eggs, probably of Great Tit. While we struggled to prise off a somewhat too well attached box for maintenance, a Robin perched nearby, in hope of eating any grubs we might have disturbed. Several boxes had had their openings enlarged by much hammering by Blue Tits or Great Tits: nobody knows why they might do this, as it increases the threat to their nests from predators. We will make aluminium plates for the fronts of all the Tit boxes (the ones with circular holes): the Robin boxes just have a wide rectangular opening, which they definitely prefer. Inside one of the boxes was a mass of woodlice in the moss; another had a plump dead Noble False Widow Spider (Steatoda nobilis) inside.

ObsessedByNature