Photo: BLM, Trumpet and Dance of the Sandhill Crane, Cosumnes River Preserve, California (Some rights reserved)
Flyway = a route regularly used by large numbers of migrating birds
There are four major north/south flyways in North America and six covering Eurasia, Africa, and Australasia.
Wikipedia
Flyway
Atlantic Flyway
Mississippi Flyway
Central Flyway
Pacific Flyway
Allegheny Front flyway
Places
Planeta.com