The Thunderbird mythical zoan = God of Sky = Uranus?
Wind/thunder/storm logia + Thunderbird zoan = Mythical zoan.
Dragon's tattoo is a reference to Native Americans.
Tattoo of the Algonquin tribe, the biggest tribe that believed in the thunderbird.
Totems like from Native Americans were everywhere in the island where Bonney was captured.
The most well known tribal totem is the Thunderbird.
Dragon using his thunder power?
Native Americans believe in a Dragon that they call the "Piasa bird", which is a Thunderbird.