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Having put, ephemera larvae ( swimming, baetis) in a small aquarium,
one evening, I was lucky enough to watch and photograph, the birth of
a fly. Below are the steps of a successfull
emergence.
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Several times, this larvae , undulating the abdomen, went up to the
surface, then , with spreads legs, sank to the bottom .But at last, it
stayed in the surface and then, emerged! Left, seen from below (with
the surface mirror effect ). Right, from the top, the folded wings are
the 2 black spots .
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Left,
the skin from the thorax open and on the right the fly emerge |
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The fly and the nymph skin got separated.
The skin is slowly sinking
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The
fly seen from the top, the wings start to unfold |
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The
wings are unfolded, but still wrinkled .
Afloat on the surface the dun will soon take wings.
Emerging is a dangerous step for a tiny fly, in the following
page, you'll see the risks associated. |
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