Scientist uses lasers, 3D-printing to save desert tortoises
To help protect the desert tortoise species threatened by rising predatory raven populations, US-based biologist Tim Shields is testing laser rifle scopes to scare off the birds. He is also testing 3D-printed 'decoy' baby tortoises filled with noxious substances to repel the ravens. A camera-equipped patrol vehicle to track living tortoises while scaring away ravens is being developed as well.