There was a mass movement of toads from a pond before the L'Aquilla quake of 2009.
There have been many documented examples of animals behaving weirdly prior to an earthquake. These scientists are trying to narrow down which odd behaviours by which animals should cause us to take preemptive steps for an imminent quake.
Full article: http://www.bbc.co.uk/news/blogs-news-from-elsewhere-33362592
Older article: http://www.bbc.co.uk/nature/15945014