“Migration” might not be the best term for the result of climate change. Migration usually applies to special, patterned travel behavior that animals undertake every year. They move south for summer and north for winter. What climate change will do is alter which habitats are acceptable and which are not; it will adjust overall ranges. It will, by extension, affect migration patterns (many temperate songbirds don’t need to migrate as far south for winter these days). Birds will probably adjust best, being very mobile. Less mobile species will have a harder time adjusting their ranges before unfavorable conditions hurt their populations — or make them go extinct altogether. How, exactly, they will adjust their ranges remains to be seen.
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