Baby Trashline Orbweavers

I originally classified these tiny black-and-white spiders as Marbled Orbweavers, but that was a very tentative ID. For the life of me I couldn't determine the species. But now I know it was merely the empty web that was throwing me off. If I'd waited a little, the telltale trashline would've appeared, and the ID would've been so easy! Patience, patience. Nonetheless, the mystery's solved, so I'm happy. Here are several juvenile specimens of Cyclosa turbinata:

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