Because they are becoming extinct.
The American black bear is in no danger, with a population of 900,000.
They are being poached because of there valuable horns. The horns are sold on the black market for use in "Traditional Chinese Medicine", and for knife and dagger handles of the Middle East, called...
With a population of between 675,000 and 800,000, the black bear is in no danger at all of extinction.
rainforests and grasslands and savannahs where they live are being preserved