North American standard symbol for ferrite bead?
The IEEE is a US-founded organization that has brought "North American standards" to much of the rest of the world. Any non-IEEE symbols being used in North America merely demonstrate our inability to fully standardize those symbols on the continent. A copy of IEEE 315 if anyone is looking.

The alternative to IEEE is the Europe-based IEC, and I could not find any information on their preferred standard for a ferrite bead.

The person who assembled those images had no final answer either; simply put, the IEEE's is the only ferrite bead standard I was able to confirm.