Non-standard special hands\n\n Thirteen Orphans + any tile in the set - also known in English as thirteen terminal hand or thirteen wonders and known in Cantonese as SAN ^z (sap⁶ saam¹ jiu¹), this occurs in 13-tile variants when the winning hand consists of one of each one, nine, wind, and dragon, and a 14th tile.

Mah Jongg means house sparrow. It is considered good luck to have a house sparrow. That is why the one bam is most often a bird (house sparrow).