PIF threats to non-breeding score continental

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Threats to Non-breeding (TN-c) indicates vulnerability due to the effects of current and future extrinsic conditions that threaten the ability of North American breeding populations to survive over the non-breeding season. Unlike TB-c, evaluation of TN-c considers vulnerability throughout the non-breeding range of North American breeding populations. However, it is still a “continental” score, in that it refers to ... more

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  • TN-c

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