Bird-like thunder spirits on both sides of the Pacific

Bird-like deities or monsters associated with thunder occur in a diverse range of cultures:

Culture	Thunder Bird	Description
Anishinaabe	Animikiig	Animikiig ("thunderers", singular animikii)1, are immense birds whose beating wings cause thunder.2
Lakota	Wakinyan	These Thunder Beings manifest as Thunderbirds, enormous creatures whose voice is thunder and whose eyes flash lightning.3 Wakinyan Tanka, the Great Thunderbird. has children, the smaller thunderbirds, whose calls are the small rolling thunders that follow the loud thunderclap of the Wakinyan Tanka.4
Quileute	Tistilal	This giant whale-snatching bird's yellow feathers are lightning and its flapping wings are thunder.5
Makah	Tatoosh6	This thunder-and lightning-deity is a humanoid giant who dons the head, wings and feathers of a great bird when he goes whale-hunting. He ties lightning-fish around his waist and throws them to make lightning.7
Chinese	Lei Gong	This Daoist deity, 'Thunder Duke', is described in the ancient book Classic of the Mountains and Seas as "having the body of a phoenix and the head of a human." He makes thunder with a drum and mallet, while his wife 'Lightning Mother' creates lightning with her flashing mirrors.8

More cultures with thunderbird myths:

 Ojibwe, Potawatomi, Menomini, Dakota, Comanche, Chinook, Chehalis, Hoh, Quinault, Klallam, Nootka, Tlingit, Haida, and other groups indigenous to Canada, the United States and Mexico.⁹

 Notes:

1. Anishinaabe_Traditional_Beliefs on Wikipedia
2. Native Languages of the Americas: Manabozho Stories and other Anishinabe Stories on native-languages.org
3. The Return of the Thunder Beings on Prairie Edge Trading Co and Galleries
4. Wakinyan Tanka,the Great Thunderbird on Pyramid Mesa
5. Robert H. Ruby, John A. Brown and Cary C. Collins, A Guide to the Indian Tribes of the Pacific Northwest, p245
6. Ray Jones, Pacific Northwest Lighthouses: Oregon to the Aleutians, p30
7. Ella E. Clark, Indian Legends of the Pacific Northwest, p161
8. Lei Gong on Wikipedia
9. Mark A. Hall and Mark Lee Rollin, Thunderbirds: America's Living Legends of Giant Birds