Baby crow stuck between boxes/pots/plants?

Okay, so, this morning, a few crows were teaching their babies to fly. One of them ended up getting stuck between a few boxes, pots, and plants, on my patio, and it can't seem to get out. It's been thrashing around for about an hour now, and I'm afraid that if I don't do something soon, the parents will leave it there. However, the parents are not far away, and the one time I tried to move a pot, I was nearly attacked. What should I do? Wait until the parents are out of sight? Call the SPCA? If I end up touching the baby, the parents will most likely end up shunning it and leaving it, regardless of its freedom, but this really doesn't seem like a job that is necessary for the SPCA to come for.