Thirteen years after they were listed as endangered in 1967, the last captive Black-footed ferret died, and the animals were thought to be extinct in North America. Then in 1981 a small relic population was discovered. Thanks to habitat management and captive breeding and reintroduction, there are now an estimated total of about 838 black-footed ferrets living in the wild.
Como Zoo trainer and zoo keeper Brianna Larson worked with Neil, one of the zoo's 16-year-old twin polar bears. She opened her hand to get him to open his mouth so she could check for any potential gum or teeth problems, then she had him rise by extending her hands in the air and had him sit. For each of these things he received one of his favorite treats, sticks of frozen lard. Zoo keepers usually check Neil and his brother Buzz every day.
At Six Flags Discovery Kingdom, Mavrick, a 14-month-old male Atlantic bottlenose dolphin tries to go eye to eye with Akaasha, a six-month-old female Bengal tiger at Six Flags Discovery Kingdom in Vallejo, Calif. on Thursday, March 5, 2009. Park animal staff strolled by the dolphin exhibit as they escorted the tiger cubs on their daily walk around the park. (AP Photo/Six Flags Discovery Kingdom, Nancy Chan)