St Mark’s Fly


Bibio marci – There have been quite a few of these large dark flies recently out and about. The male is depicted in the top image, and the female below, which shows obvious differences between the sexes. They appear around April 25th, St Mark’s Day, hence the name. They are quite slow and lazy fliers. Double-click images to enlarge.


St Mark's Fly Bibio marci male

St Mark's Fly Bibio marci female

© Peter Hillman ♦ 4th May 2020 ♦ Local woodland margin, South Staffordshire ♦ Nikon D7200


17 thoughts on “St Mark’s Fly

  1. Another English gardener was asking for suggestions as to the identity of an insect that had arrived at his place, and this might be it. I’ll share the post with him, and see what he thinks. Your photos are quite wonderful.

    Liked by 1 person

    1. Thank you, Linda. I hope this helps them id their find, although there are a few similar species around. These are large, though, and quite unmistakable.

      Liked by 1 person

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