Conservationists called the 13-nation agreement an important step in protecting the wild cats, whose numbers have plummeted in recent decades as human encroachment has eliminated more than nine-tenths of their habitat. Experts say there are fewer than 3,500 wild tigers today, compared to an estimated 100,000 at the beginning of the 20th century. Hailing the agreement, Michael Baltzer, head of the WWF Tiger Initiative, said "There never has been a high-level government commitment to take forward tiger conservation."