Here's a general overview:
* Spring and Summer: Most salmon species, like Chinook, Sockeye, and Coho, migrate upstream during these months.
* Fall: Some species, like Pink and Chum salmon, migrate in the fall.
Factors influencing timing:
* Water temperature: Salmon need cool water temperatures for their journey.
* Water flow: Higher water flow helps them navigate upriver.
* Day length: Changes in day length signal the start of the spawning season.
Specific examples:
* Chinook Salmon: Typically migrate in late spring and early summer.
* Sockeye Salmon: Migrate in summer, often reaching spawning grounds in July and August.
* Coho Salmon: Migrate in late summer and early fall.
* Pink Salmon: Migrate in late summer and early fall, with a two-year life cycle.
* Chum Salmon: Migrate in late summer and fall, also with a two-year life cycle.
Note: These are just general guidelines. The exact timing of salmon migration can vary significantly depending on the specific location and year.