Yeah, all US Army helicoptors are named for American Indian tribes with the sole exception of the Supercobra. But there is yes a species of salmon called the Chinook so you're both right.
Seems you need to go to the French for choppers named after animals:
Airbus Helicoptors H125 Fennic (species of fox)
AS565 Panther
AS32 Super Puma/Cougar
AS365 Dauphin (Dolphin)
Aerospatiale SA 343 Gazelle
Alouette (Lark)
Plus of course the British Leonardo AW159 Lynx