There ARE Spicebush Swallowtail Butterfly caterpillars inside the leaf rolls!  (See “Spicebush Leaves are Getting Rolled Already” post below.)  A friend helped me unroll a couple of leaves and there they were!  We let the leaves roll back up so the little caterpillars were “safe” again.  (The caterpillars generate a white sticky substance — you can see it in these pictures — that keeps the rolls closed up.) – Robin

Baby Spicebush Swallowtail Caterpillar inside a Leaf Roll

Another one:

Another Baby Spicebush Swallowtail Caterpillar