Category Archives: Wildlife

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.

Love of Nature, Natural History, Nature Reserves, Wetlands, Wildlife

Bullfinch! Winter Walk Hits Target

2 February 2015 Ian Alexander

Winter has definitely set in. The spinach beet in my garden was all frozen, the air at -3 Celsius and the ground presumably rather colder under a clear night sky. Fearing it might all be lost, I picked some and went out to see what there might be today down at Wraysbury Lakes.

Almost the first thing I saw was a bulky little finch high in a waterside willow. It called ‘deu’ quite loudly, fidgeted about and flew before I could focus on it. Still, there was no doubt it was a Bullfinch: the call, its shape, its solitary habits, and its shyness all pointing the same way. It is never an easy bird to see, even where it is resident (it is regularly ringed at Wraysbury). Leafless trees and the rising energy of the coming breeding season provide one of the few opportunities to catch a glimpse of this less well known finch.

At first sight there seemed to be no birds out on the lake. Finding a small illicit patch cleared by a fisherman I set up the telescope and looked about. A Pochard or two; some Tufted Duck and Coot; a male Goldeneye… but the Smew and Goosander of a week or two ago were nowhere to be seen. The old truth is that you never know what you’ll see: but it’s often a delightful surprise, and almost always energizing to be out in nature.

I walked on and looked about again: some rather white ducks caught my eye in the distance. Two male Goldeneye, each with a female in tow. The males threw their heads forward a few times, pretended to preen; one threw his head back and forth, then lowered his head and stretched it out and in. His female swam after him, her head resting on her back as if she were asleep! But she was certainly watching the display, and swimming to keep up a few lengths behind.

A loud squawk betrayed a Heron; it flapped out of cover at the end of the lake and landed on the bank behind the ducks. A few Mallard panicked from the water below me; a Moorhen briefly took flight.

Away from the lake, a few Robin and Dunnock hopped in and out of the bushes. A solitary Fieldfare or two gave their chack-chack call from the hawthorns, watchful and flighty. Another Bullfinch calling, this time atop a bare hawthorn bush – or maybe the same bird, half a mile on – and again I couldn’t get binoculars on to it, despite my stealthiest movements: it had surely seen me at once, and just took a few seconds to decide when to flee.

A Kestrel hovered beyond the tall poplars: no Buzzards or Red Kites today, but really the Kestrel feels almost more special than them, its numbers declining across Britain.

A few Jackdaws, Carrion Crows and Wood Pigeons on the horses’ hill; some Fieldfares in the trees, with a single Redwing; a Stock Dove flying low.

Natural History, Nature Reserves, Wildlife

A Bright Winter’s Walk in Richmond Park

30 January 2015 Ian Alexander

In Scotland, the male of the Red Deer is called simply a Stag, all other male deer (presumably Roe in that country) being known as Bucks. Down here, with Sika and other species about, it may be wise to name the species explicitly. There are signs up warning of the impending cull, so now may be the best time of year to see fine large stags resting quietly, the rut over.

Richmond's splendid anthills — Richmond’s splendid anthills

I was welcomed to the park by a flock of Jackdaws chattering in the trees. Down in the valley, last year’s grass stalks are whitening, the fine big anthills well outlined in the low winter sunlight.

A Stonechat was perched on a slender stalk, level with the tops of the grass; there cannot be much in the way of insect food to catch just now.

On the Pen Ponds, there were remarkably few waterfowl of any kind, but the lower pond had half-a-dozen Pochard. the males handsomely rufous-headed, a pair of Wigeon, the male with a conspicuous white wing-bar, and tucked in a corner under the willows a pair of Egyptian Geese, taking to the water and protesting with short dry honks when molested by a dog.

Walking back up the hill, a Kestrel hovered briefly, rested in a tree giving a good view of his spotted breast and back. Two herds of Red Deer, one at the base of the hill, one at the top, both with all ages and both sexes together, grazed silently. In the muddiest places, footprints of men, dogs and deer clustered together.

ObsessedByNature