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Extreme Endurance Migration: What Is the Limit to Non-Stop Flight?

Figure 6

Two hypothetical scenarios about the evolution of long-distance migration in bar-tailed godwits breeding in Alaska.

(Top) A breeding range expansion with maintained migration direction but increased distances. (Bottom) An increased migration direction paired with shifted migration distance.

Figure 6

doi: https://doi.org/10.1371/journal.pbio.1000362.g006