 Experts say it's best to get them from food. The number of animals and plants in danger of disappearing is skyrocketing. CBS's Cammie McCormick. The latest red list of threatened species sounds the alarm. It now includes more than 160,000 animal and plant species. 6,000 more were added to the list in just the last year. Everything from cacti and chili to giant lizards in the Canary Islands.