Showing an egg about to hatch, with the larva's black head prominent, and a standard middle aged egg. When freshly laid they are a uniform blue-green.
In the wild, iris eggs have (almost certainly) all hatched by now, and there is an even mix of 1st and 2nd instar around. They almost invariably eat the egg case top and sides on hatching, leaving the egg case base intact. This can remain on the leaves for weeks.
The flight season is ended, but in my end is my beginning...
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