I recently posted some pictures of this ground beetle with abnormal milky-white eyes and asked if anyone knew the cause (click here for post with more pictures)
I also posted a picture with the same request on Twitter and after it had bounced around for a bit got a reply from entomologist Dr. Ross Piper @DrRossPiper who identified the likely cause - a parasitic gordian worm aka nematomorph aka horsehair worm, that grows in its host and can have this effect on its cuticle. Infected hosts tend to wander around in broad daylight and seek water, where the parsitic worm emerges from its host to breed.
He sent me the link to this amazing footage of a tropical example (WARNING:GRUESOME)
Gordian worm emerging from a grasshopper
Really wish I'd captured the beetle and brought it home now.
Showing posts with label ground beetle. Show all posts
Showing posts with label ground beetle. Show all posts
Wednesday, June 1, 2016
Monday, May 30, 2016
Beetle with eyes like pearls
I found this ground beetle, which I'm pretty sure is Abax paralellopipedus, in woodland beside Shittlehope burn in Stanhope, Weardale this morning.
It's a common species but what's unusual about this one is its eyes.
They should be black but these are milky white, like pearls. They don't seem to have the individual facets (ommatidia) that are typical of insect eyes.
I've no idea why this should be but I've had a helpful and rather gruesome suggestion from Dr. Ross Piper
CLICK HERE FOR THE LIKELY CAUSE
Labels:
Abax paralellopipedus,
Beetles,
ground beetle
Sunday, March 22, 2015
Cold-Blooded and Spineless
Last Friday saw the launch of the North Pennines Area of Outstanding Natural Beauty Cold-Blooded and Spineless project. Over the next five years it will train volunteers and local wildlife groups to identify and map the distribution of invertebrate animals in the AONB, as well as working with schools and artists to encourage them to appreciate and celebrate the wealth of smaller elements in the wildlife of the region.
You can read much more about the project at http://www.northpennines.org.uk/Pages/Cold-bloodedandSpineless.aspx
After the various presentations at the launch, held at the Environmental Centre at Harehope Quarry near Frosterley in Weardale, we went on a short bug hunt. Predictably, there weren't many flying insects about in mid-March, although someone did catch this male mosquito with rather magnificent antennae.
But when we started turning over stones it was a different story.
Lots of ants
A common pygmy woodlouse Trichoniscus pusillus
I think this one is a young specimen of the common shiny woodlouse Oniscus asellus
Lots of black snake millipedes Tachypodoiulus niger
Several species of springtail. In the picture above, showing the underside, you can see the forked furca folded under the tail, that it uses like a pole-vaulter's pole to catapult itself into the air.
Click here for more about springtails
A very fine devil's coach horse, with a formidable pair of needle-sharp jaws
Click here for more about devil's coach horses
Numerous ground beetles, including ....
..... this one that played possum when it was turned onto its back, and ...
.... this one, that was carrying a hitch-hiker on its back, which ...
... looks like it might be a very small tick.
I haven't had time to ID these properly yet, but am posting them now so that those who found them can download the pictures.
It's amazing what you can find if a dozen people spend half an hour turning over stones, even if it is a cold March afternoon!
If you'd like to know more about the Cold-blooded and Spineless project, or would like to become involved, contact samantha@northpenninesaonb.org.uk
You can read much more about the project at http://www.northpennines.org.uk/Pages/Cold-bloodedandSpineless.aspx
After the various presentations at the launch, held at the Environmental Centre at Harehope Quarry near Frosterley in Weardale, we went on a short bug hunt. Predictably, there weren't many flying insects about in mid-March, although someone did catch this male mosquito with rather magnificent antennae.
But when we started turning over stones it was a different story.
Lots of ants
A common pygmy woodlouse Trichoniscus pusillus
I think this one is a young specimen of the common shiny woodlouse Oniscus asellus
Lots of black snake millipedes Tachypodoiulus niger
More millipedes, that I've yet to identify
Two very small snails, awaiting identification
Several species of springtail. In the picture above, showing the underside, you can see the forked furca folded under the tail, that it uses like a pole-vaulter's pole to catapult itself into the air.
Click here for more about springtails
A very fine devil's coach horse, with a formidable pair of needle-sharp jaws
Click here for more about devil's coach horses
Numerous ground beetles, including ....
..... this one that played possum when it was turned onto its back, and ...
.... this one, that was carrying a hitch-hiker on its back, which ...
... looks like it might be a very small tick.
I haven't had time to ID these properly yet, but am posting them now so that those who found them can download the pictures.
It's amazing what you can find if a dozen people spend half an hour turning over stones, even if it is a cold March afternoon!
If you'd like to know more about the Cold-blooded and Spineless project, or would like to become involved, contact samantha@northpenninesaonb.org.uk
Saturday, April 9, 2011
Early Spring in Weardale
For once we managed to get out while there was still dew on the grass and headed up Weardale to St. John's Chapel and Chapel Fell.
Alchemists are said to have believed that the little silvery droplets of water that are secreted around the edge of lady's mantle leaves overnight had magical properties and were an essential ingredient in potions for turning base metals into silver. The Latin generic name for lady's mantle - Alchemilla - means 'little alchemist'.
We arrived just as this spider had finished spinning a new web, ready to snare flies warmed into life by the early morning sun. The owner of the web is highlighted by the sun on the twig on the right (double-click for larger image).
When the spider had finished the web it sat on its twig and stretched out a single leg that gripped a fine thread that runs right to the centre of the web (double-click to see this - you can see the spider's leg sticking out at right-angles to the twig, highlighted by the sun). When it catches a fly the vibrations will be transmitted along that signal thread and the spider will race out to impale it with its fangs.
With spiders' webs around it's safest to travel at ground level, like this ground beetle making its way over a carpet of last-year's larch needles.
Up on Chapel Fell some lapwings were already sitting on nests, ever-vigilant for marauding crows.
This coal tit had found a crevice in a stone wall that was just large enough to squeeze through ....
Nest sites don't come much more secure than this.
Sallow flowers produce nectar that attracts a wide range of insects, including this pair of peacock butterflies.
Although last winter was the most severe in recent memory, but I can't remember a spring when I've seen so many peacock butterflies. They seem to have hibernated very successfully around here.
This little insect is a water cricket Velia caprai, scooting across the surface film in a pool in one of the pastures in the valley.
Up on the fell tops the sounds of the day were the calls of lapwings and curlews, the drumming of snipe and the sound of sheep bleeting - especially when it was feeding time.
Down in the valley bottom it's lambing time - a proud mother with twin lambs.
It's been the warmest day of the year so far - dawn-to-dusk sunshine - perfect weather for sitting on the grass and having a doze in the afternoon heat.
Labels:
Alchemilla,
coal tit,
dew,
green plover,
ground beetle,
lady's mantle,
lambs,
lapwing,
peacock butterfly,
sheep,
spiders,
Velia caprai,
water cricket,
Weardale
Tuesday, May 25, 2010
Life and Death Struggle....
We encountered this life-and-death struggle between a ground beetle larva and an earthworm that had ventured out of its burrow in Teesdale.
The beetle sunk its jaws into its victim and refused to let go, even though...
... the worm twisted and turned...
... rolled over on its attacker.....
... and glued it down with sticky mucus.
We didn't watch the end of the contest. I suspect the worm might have reached safety, though some segments may have been severely damaged.
More examples of mortal combat:
Labels:
earthworm,
ground beetle
Subscribe to:
Posts (Atom)

















































