- Atrelor (10/12/2010) revealed the habit of T, plummetus to engage in group sporting activities. Observers have noted a related social phenomenon. After completing the sporting activity the male drop bears move off in a body to a location where they know from experience that a fermented juice or liquor is generated by specialised plants. Here each bear imbibes freely. Clearly, the liquor is toxic, addictive and causes behaviour change. The drop bears become more aggressive, make loud grunting noises and start fighting. Some regurgitate the liquor, others lose control of the urinary bladder sphincter muscle. All of them eventually fall asleep with loud snoring. The females take offence at being ignored despite overtly displaying their secondary (and even, on occasions, their primary) sexual characteristics. The consequent low coupling rate is clearly the reason for T. plummetus being placed on the endangered species list. Anthropologists now believe that this type of behaviour is not peculiar to the male drop bear and may even have been acquired by him by observation of other inhabitants of the continent.