Which IoT technology has been most effective in reducing rhino poaching in African nature reserves by over 80% in implemented areas?

The natural world is undergoing its own digital transformation with conservation organizations implementing IoT solutions to monitor and protect wildlife and natural habitats. Advanced technologies are revolutionizing how we track species, prevent poaching, and study ecosystems. This poll tests your knowledge about cutting-edge conservation tech being deployed in nature reserves and wildlife sanctuaries around the world.

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Smart collars with biometric sensors that trigger alerts when animals show distress patterns
Networked thermal cameras with AI that can distinguish humans from animals and alert rangers to intrusions
Drone surveillance systems with automatic facial recognition to identify known poachers
RFID microchips embedded in rhino horns that track location and vital signs in real-time