Tag Archives: Gasteruption jaculator

Sparrowhawk drives Squirrel from Nest!

The day looked unpromising for a nature walk, let alone a butterfly transect, but it was time to do one, so after a cursory tour to clip the worst of the brambles from the paths, we set off with clipboard and cameras to see what we could find.

Gasteruption jaculator Ichneumon on hogweed
Gasteruption jaculator Ichneumon, nectaring on hogweed

The hogweed, still in flower despite weeks of rainy weather that has caused many stalks to topple, was alive with flower beetles, bees large and small, and this magnificent Ichneumon wasp with its incredible ovipositor.

At first we saw only white butterflies, but a Comma was sunning itself, and a Speckled Wood had somehow survived the wet weather.

Strangalia maculata on bramble flower
Strangalia maculata on bramble flower

We saw two Strangalia maculata longhorn beetles taking nectar. They are Batesian mimics of wasps, looking in all truth only very slightly waspish, but perhaps young birds are put off. Or perhaps they do in fact taste foul.

We were just discussing the Sparrowhawks as we approached their nest tree when a commotion broke out along a branch, and a Sparrowhawk flew rapidly with its claws forward: a Squirrel raced away from the nest, hotly pursued by the angry bird; they leaped to the neighbouring tree and scurried up the matching branch out of sight. The Sparrowhawk broke into a loud excited chittering trill. We were all excited, laughing at the speed, the impossibility of reaching for a camera.

A Holly Blue flew over the pond, above several pairs of mating Azure Damselflies and a Yellow Iris now chewed right down to a semi-leafless state by the Iris Sawfly larvae.

Mating pair of Azure Damselflies on Water Mint
Mating pair of Azure Damselflies on Water Mint

Down at the Anthill Meadow, a single Small Skipper perched on an ear of Yorkshire Fog.

Small Skipper in anthill meadow
Small Skipper in anthill meadow

On the next ear was a male Bluetail Damselfly: they have emerged from the pond in the past week.

Bluetail Damselfly Ischnura elegans
Bluetail Damselfly Ischnura elegans

The wooden rail was sticky with snail pulp: a Song Thrush had hammered three snails open on the exposed woodwork, leaving shells and sticky patches behind.

Wooden rail as thrush's snail anvil
Wooden rail as thrush’s snail anvil

Two days ago I saw a Cinnabar moth in the Small Meadow. There is plenty of Ragwort coming up, so with any luck there will be plenty of caterpillars soon.

Cinnabar moth in the small meadow
Cinnabar moth in the small meadow

 

Large Skipper and Ichneumon in Gunnersbury Triangle

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.

Large Skipper on reeds by pond
Large Skipper on reeds by pond

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.

Mating Green Shield Bugs
Mating Green Shield Bugs

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.