migrate, partial migration, in which only some migrate while others stay year-round, differential migration, where all members migrate but timing and distance vary due to age or sex, and irruptive migration, in which animals will only migrate certain years depending on climate and resource availability.

Factors

The factors that determine migration methods are variable due to the inconsistency of major seasonal changes and events. When an organism migrates from one location to another, its energy use and rate of migration are

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