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  1. #1
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    Default Alder Leaf Beetles

    When fishing the Avon this past weekend there was fairly steady stream of deep blue/violet beetles drifting past me. I didn't see any obvious evidence of them being eaten by fish. A little way upstream I came across the source:

    Alder Leaf Beetles-dscn1072-jpg

    After googling I am assuming they are Alder Leaf Beetles, on an alder or hazel tree?

    My next question is, do trout eat them? I know trout eat other beetles, but these did seem to be left well alone.
    Attached Images Attached Images Alder Leaf Beetles-dscn1073-jpg 

  2. #2
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    Default Re: Alder Leaf Beetles

    could they be green doc beetleGreen Dock Beetle | NatureSpot

    have you tried a black and peacock Alder Leaf Beetles-black-peacock-2-jpg
    Last edited by doobrysnatcher; 10-09-2019 at 09:58 PM.
    how he may read upon the varying skies,from thence to judge the order of his flies,
    how he may place them on his trailing link,know which should float,or which should partly sink

  3. #3

    Default Re: Alder Leaf Beetles

    That was my first impression, they look just like dock beetles but apparently
    there is an alder leaf beetle which is blue rather than green - Agelastica alni - and TTT's description fits the bill.
    Partial to hazel too - Agelastica alni - Wikipedia

    Interesting observation, I've never seen one before.

    Worth reporting to the local recorder.
    Last edited by diawl bach; 10-09-2019 at 11:08 PM.
    Musha rig um du rum da

  4. #4
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    Default Re: Alder Leaf Beetles

    Quote Originally Posted by diawl bach View Post
    That was my first impression, they look just like dock beetles but apparently
    there is an alder leaf beetle which is blue rather than green - Agelastica alni - and TTT's description fits the bill.
    Partial to hazel too - Agelastica alni - Wikipedia

    Interesting observation, I've never seen one before.

    Worth reporting to the local recorder.
    Wiki suggests they are pretty rare and may have spread very fast! So of course I'm now doubting my memory - were they green or blue? But I'm 100% certain they were blue, an iridescent blue and violet. And from the image you can just about (I think) make out a blue rather than green sheen, although not quite as brilliant as shown on Wikipedia.

    Who would you think in the Wiltshire area would be interested in this?

  5. #5

    Default Re: Alder Leaf Beetles

    Most counties have recorders who you can send bservations to, Marc Arbuckle is the beetles guy for Wiltshire according to this leaflet - http://wsbrc.org.uk/wp-content/uploa...19June2019.pdf
    Musha rig um du rum da

  6. #6
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    Default Re: Alder Leaf Beetles

    Thanks, notified.

  7. #7
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    Default Re: Alder Leaf Beetles

    Alder leaf beetle / RHS Gardening

    Doing a little more digging, the RHS' website says these beetles were rediscovered in Hampshire in 2014 and are now abundant in adjacent areas so that probably confirms it.

    A nice story about a once extinct creature making a return. Although the trees don't look very good after these beetles have been through them. I wonder what was behind their reintroduction in the last decade.

  8. #8
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    Default Re: Alder Leaf Beetles

    The Wiltshire recorder has confirmed these are Agelastica alni, in case anyone is interested. Recorded for the first time in Wiltshire in 2016 after assumed to be extinct.

    They were abundant in the water. I'd be surprised if trout didn't eat them.

  9. #9

    Default Re: Alder Leaf Beetles

    This has been an interesting thread, well done for noticing this unusual species, glad to hear the sighting's confirmed.
    Musha rig um du rum da

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