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earthstar

~ a celebration of nature

earthstar

Tag Archives: Green dock beetle

The cycle goes round and round

14 Friday Jul 2023

Posted by sconzani in insects, plants

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Tags

beetle eggs, beetle larvae, beetles on dock plants, dock beetles, dock plant, Green dock beetle

All that’s missing from this illustration of the life cycle of the Dock beetle is the pupation stage but I’m not going to disturb their underground pupae to show you that. Though common, I still find them fascinating and, because they’re common, they’re a good insect to show children how a beetle’s life cycle functions.

230714 dock beetle life cycle

n.b. There may be an extra insect in the photo of the larvae. I suspect those tiny white dots might be hoverfly eggs, as the larvae of some species enjoying feasting on various leaf beetle eggs and larvae. I’ll be doing more leaf-turning to check.

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123/366 Dock beetles

02 Saturday May 2020

Posted by sconzani in insects, nature

≈ 2 Comments

Tags

beetles, beetles on dock plants, British beetles, dock beetles, Gastrophysa viridula, Green dock beetle

Iridescent Green dock beetles are out in force now on the Dock plants in one of my local parks. I’ve blogged about these gorgeous mini-beasties before (Green dock beetles, May 2016) so today I’m just going to share a few photos. Keep an eye out for these on your exercise walks, and don’t forget to check carefully under the holey leaves for eggs and their little grey grubs.

200502 green dock beetle (1)

200502 green dock beetle (2)
200502 green dock beetle (3)

200502 green dock beetle (4)

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More from Merthyr Mawr

09 Tuesday May 2017

Posted by sconzani in insects, nature, wildflowers

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Tags

biodiversity, biological diversity, Blood bee, Common Stork's-bill, Glamorgan Fungus Group, Green dock beetle, Merthyr Mawr National Nature Reserve, Micropterix calthella, Navelwort, Poplar leaf beetle, Red-headed Cardinal beetle

As I wrote yesterday, with very little fungi to be found our Glamorgan Fungus Group foray on Saturday developed into a more general nature ramble. I’m afraid I wasn’t writing down the names of all the various critters and plants we saw so I can’t identify everything in these photos but I can name some.

170509 (2) Pyrochroa serraticornis Red-headed Cardinal beetle
170509 (3) Centipede
170509 (4) Eggs of Gastrophysa viridula Green dock beetle
170509 (5) Micropterix calthella moths
170509 (6) Erodium cicutarium Common Stork's-bill
170509 (7) Two species of snails
170509 (8) Umbilicus rupestris Wall pennywort or Navelwort
170509 (9) Chrysomela populi Poplar leaf beetle
170509 (10) Sphecodes sp Blood bee

The first is a Red-headed cardinal beetle (Pyrochroa serraticornis), a very pretty beetle though this one wouldn’t keep still for me. The centipede was the same and I’m afraid I don’t remember its name, though I was told it’s not particularly common. It tickled! I think the little yellow dots are the eggs of the Green dock beetle (Gastrophysa viridula) as we saw a pair mating nearby. The tiny moths on the buttercup flower are Micropterix calthella. The plant with the pink flower is one I actually remembered from my botany walk on Thursday – a miracle! It’s Common Stork’s-bill (Erodium cicutarium). Then we have two different species of snail cosying up together. Once again, I was told the names but didn’t write them down and have forgotten (must do better next time!). This very pretty plant was a new one for me and it has two common names, so you might know it either as Wall pennywort or Navelwort (scientific name Umbilicus rupestris). Next is another beetle, this time a Poplar leaf beetle (Chrysomela populi). It was a gorgeous wee thing, with metallic green thorax and dark red body, almost like an oversized ladybird. And, last but not least, was this rather angry Blood bee (Sphecodes sp.). It was trying to lay its eggs in the holes of mining bees when it was netted and potted up for a quick close-up look.

170509 (1) Millipede Pill bug Slug

My favourite moment of the day, though, was when I turned over this log. I particularly loved the little grouping of millipede, pill-bug and slug but these were only a few of the various creatures to be seen. It was just nice to see such biodiversity co-existing happily together. A lesson for us all, I think.

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Green dock beetles

22 Sunday May 2016

Posted by sconzani in insects, nature, spring

≈ 4 Comments

Tags

dock plant, Gastrophysa viridula, Green dock beetle

Green dock beetle seems such a plain name for such a beautiful little creature as this. Even its scientific name, Gastrophysa viridula, makes it sound like a brand of effervescent stomach-acid relief tablet. I think it should be renamed Rainbow dock beetle, as the metallic sheen of its green wing casings makes it appear blue, purple, red, turquoise or even gold, depending on the light.

1 Green Dock Beetle Gastrophysa viridula
2 Green Dock Beetle Gastrophysa viridula

At around 4mm long, Mr GDB is smaller than Mrs GDB, who is usually around 7mm, and he looks even smaller when the female’s body becomes swollen during pregnancy. She expands so much even her wing cases won’t fit properly.

3 Green Dock Beetle Gastrophysa viridula
4 Green Dock Beetle Gastrophysa viridula
5 Green Dock Beetle Gastrophysa viridula
6 Green Dock Beetle Gastrophysa viridula
7 Green Dock Beetle Gastrophysa viridula

he doesn’t give up easily!

As you can surmise from their name, these little beetles live on dock plants and are easily spotted in the months of May and June, if not by that iridescent shimmer, then from all the little holes they make in the dock leaves. Turn over a leaf and you’re likely to find little clusters of yellow-orange eggs or, if you’re lucky, a little group of the next generation, the little dark-greyish larvae. These will eventually pupate underground, then between 7-10 days later the adult beetles will emerge to start the cycle all over again.

Green Dock Beetle Gastrophysa viridula (5)
Green Dock Beetle Gastrophysa viridula (21)
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Springtime in the shrubbery

16 Monday May 2016

Posted by sconzani in insects, nature, spring

≈ 4 Comments

Tags

crane fly, Green dock beetle, harlequin ladybird, St Mark's flies

I took myself off on a long walk yesterday afternoon, no backpack full of camera gear, just my point ‘n’ shoot in my hand, intending to walk not look for critters. But, no sooner had I got to the start of the walk proper than the critters began presenting themselves, and I began to feel rather like a voyeur.

160516 Harlequin Ladybirds

First it was the Harlequin ladybirds, on the very top leaves of a bramble so hard to miss, and three of them. Was the second female waiting her turn, basking in the afterglow, or something of a voyeur herself?

160516 Green Dock Beetle

A metallic flash on the neighbouring bush caught my eye and there were a couple of Green dock beetles, also getting into the swing of spring, though I think the male was a little confused as to how to go about things. He won’t accomplish much just riding on the female’s back.

160516 crane flies

Further on, I bent down to re-tie my shoelace and what should I see but two Crane flies, making more Crane flies.

160516 Long-horned black legionnaire

And I almost stood on these final two, blatantly having it off in the middle of the footpath. I think they’re Long-horned black legionnaire beetles**, though I’m not entirely sure. They, like all the other minibeasts, were certainly feeling stimulated by the Sunday sunshine.

** Many thanks to Paul Challinor. These are actually St Mark’s flies (Bibio marci).

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About me

sconzani

sconzani

I'm a writer and photographer; researcher and blogger; birder and nature lover; countryside rambler and city strider; volunteer and biodiversity recorder.

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