Does any animal besides humans commit suicide? (2001)

Animals that Commit Suicide - <a href="http://query.nytimes.com/mem/archive-free/pdf?res=9F03EEDC1039E033A2575AC0A9609C94649ED7CF" rel="nofollow">http://query.nytimes.com/mem/archive-free/pdf?res=9F03EEDC10...</a><p>article from 1895 nytimes

Nightingales if caged!