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Why are some red deer subspecies threatened?

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male white-tailed deer — deer Male white-tailed deer (*Odocoileus virginianus*).

While the red deer (Cervus elaphus) is classified globally as a species of least concern, several of its approximately 20 subspecies are considered threatened. This status is primarily driven by the following factors:1

Hunting Pressure: The species has long been hunted for both food and sport, and unregulated hunting or poaching can severely deplete local populations.12
Habitat Loss: The destruction and fragmentation of natural environments significantly reduce the areas available for these animals to thrive.1
Interbreeding: Some subspecies in North America and Eurasia have experienced population declines due to interbreeding with nonnative red deer subspecies, which can threaten the genetic integrity of local populations.1

Protecting these vulnerable subspecies is an ethical imperative, as maintaining biodiversity is essential for the health of our global ecosystems.2