Ants on the move? "a person in Thailand"? "other accounts"? Do you have a primary source that is not anonymous about the sources? The cited link is to details about the tsunami, not animal behavior. The rest of the article talks about how animals might have sensed the vibrations of the earthquake, not how they might have predicted it.

I'm still waiting to hear who saw any anomalous animal behavior BEFORE the Sumatran earthquake. Unattributed quotes from an American kids' science writer are not evidence the way I do research.