This year, New York's Rockefeller Center Christmas tree was recycled to make for the Bronx Zoo's Siberian tigers, grizzly bears, African Lions, Asian small - clawed otters, snow leopards, and polar bear. At the Bronx Zoo, a primary goal is to reproduce the animals nautral environments and to find toys that keep them engaged physically and mentally. It's really important for animals to get a lot of stimulation to exercise their bodies and mind. The big cats were given cross-sections of the trunk with strip of deer hide attached to them. The toys were also sprayed with perfumes to attract and stimulate the cats. The polar bear, blizzard, made his way over to his new toy, a cross-section of the tree with an inserted branch, and effortlessly lifted the bottom of the massive branch. He dragged it around, knocked it down, and then proceeded to find a way to stand it upright again.