In this review, evidence on suicidal behaviours among animals is analyzed to discover analogies with human suicidal behaviour. Literature was retrieved by exploring Medline/PubMed and PsycINFO databases & through manual literatuare searches. Few empirical investigations have been carried out on this topic. Nevertheless, sparse evidence supports some resemblance between the self-endangering behaviour observed in the animal kingdom, particularly in animals held in captivity or put under pressure by environmental challenges, & suicidal behaviours among humans. (114 refs.)