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What is it? in Southeastern Pennsylvania - Coptodisca

What is it? in Southeastern Pennsylvania - Coptodisca
west chester, chester County, Pennsylvania, USA
August 4, 2010

Moved from Heliozelidae. Coptodisca powellella and C. quercicolella both mine oak leaves. No species is documented as mining poplar leaves, but C. saliciella mines willow leaves (same family), and I found heliozelid mines in Freemont cottonwood leaves in Utah, which must have been either that species or a related, undescribed species--which is just to say that it's not out of the question that these came from a poplar. If they are so abundant, you may be able to see the holes they made in the leaves when the leaves fall.

Moved from Unsolved bug-related mysteries. These are leaf-mining moth larvae (family Heliozelidae) which, having finished feeding, have cut out little oval leaf pieces which they will use as pupation chambers. If you know what kind of tree they dropped from we can probably determine the genus, if not species.

Interesting. Then the affecte
Interesting. Then the affected trees should have visible damage in the leaves. If there are as many as reported, I'd think it would be relatively easy to spot. Maybe the OP can keep some and see what hatches out as well.

Other image said
"poplar or oak"

Moved from ID Request. Maybe Charley will see it here

Looks to me like
there's some kind of small larva sticking out of two of them. That one to the middle left and the one in the upper right. Both facing 'up'.

"millions" of these raining down from trees sound and even in the larger picture, look like seeds. The strange part is that you say they have a foot or worm sticking out of them with which they move? is that right? could it be a larva of some kind living in some of the seeds? like a Mexican jumping bean ??? Do they all move? Are they still around? can you take a detail pic of one more close up and from different views?

Yes They move.
I have since looked at info for the scale and I am pretty sure that is what it is. They move and YES I too thought mexican jumping bean wacky to watch the whole driveway move. They do look like a seed BUT THEY MOVE with a worm like neck or foot. We have lived amongst the trees for many years and this is the first year they have fallen.

Well I hope we get an answer on these...
from an expert,; I'm not one. But now on these close up if these are scale insects they look to me like something in the Armored scales maybe like these:

but (again not an expert) I think only the very tiny babies (crawlers) move around on 6 little insect feet. I think once scales look like these they don't move.
The only thing I know (not an expert again :))that kind of looks like these (but not as smooth) with a "worm" that moves in and out of it is maybe some kind of bagworm moth like this:

This one is not very seed looking, but I have seen some around my house that are much flatter and seed-like. But yours don't seem to be made from silk.

click photo
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They remind me of scale insects. If they are falling from the trees, perhaps it's part of their life cycle or they are being attacked by a disease or illness. It's hard to say. Can you let us know what tree species they were falling from? Posting a picture of a leaf will help if you can't tell which one. It very much helps confirm a species.

I really do have a hunch it's a Scale Insect, but I may be missing something. I'm sure there is someone else here who has an eye for these things.

they are coming from either a
they are coming from either a Tulip Poplar or an Oak tree there are many nearby.

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