A new arrival!

The eggs of an alderfly laid on my bulrush today

The eggs of an alderfly laid on my bulrush today

These eggs signal an exiting new arrival at the pond – and an animal which in turn depends on the bulrush colonisation. 

They are alderfly eggs, fresh laid today (when laid they are white – soon they will turn brown).

The appearance of adult alderflies in April and early May is a classic sign of spring for pond lovers – the dark brown flies, which look a bit like moths, fly in the day and can be seen around tall emergent plants, where they lay their eggs. Bulrushes are a typical egg-laying site.

The common alderfly Sialis lutaria: these dark brown flies, with thieir wings in a tent over their backs, are a sure sign that spring is well and truly with us. They are often very confiding - they will happily sit on your shirt or your hand

The common alderfly Sialis lutaria: these dark brown flies, with their wings held like a tent over their backs, are a sure sign that spring is well and truly with us. They are often very confiding - they will happily sit on your shirt or your hand

I saw adult alderflies last year visiting the pond – but with no bulrush until the late summer there were no egg laying sites.

Now they’ve arrived – and alderfly larvae are a sign of good quality ponds. I’d been hoping they would come, and I’m very happy to see them.

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2 Responses to “A new arrival!”

  1. Alisdair Macleod Says:

    Hello

    I have seen eggs like this on my iris in the pond, but I thought it was a crazy butterfly that had made a mistake! Could there be another animal that could have laid, as I haven’t seen any adult alderflies?

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