Nonbreeding Distribution In Different Populations Of The Same Species

Because of their greater similarity to one another, individuals from different populations of the same species are likely to overlap more in habitat and food preferences than are individuals from different species, and hence compete more strongly. Not surprisingly, therefore, some of the same patterns of geographical segregation that occur among closely allied species also occur among different populations of the same species, and individuals from different parts of the breeding range often migrate to mainly different parts of the wintering range. Such patterns are not always easy to detect because their demonstration usually requires abundant ring recoveries from different parts of the breeding and wintering ranges.

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