1958 Disney documentary "white desert" (White Wilderness) popularized the view: lemming suicide sometimes in groups, they jumped into the sea cliffs and drown myself in the bottom of the cliff, in order to ease the number of ethnic groups occasional surge. Therefore, this generation of children as adults habitually think that suicide is present in the animal kingdom. While this statement is very possible, but this is not true.
According to Webster's dictionary, a suicide is "voluntary and deliberate act to end their own life or situation", most experts think that animals do not have the capacity to implement such action. However, this case does not mean that animals do not, sometimes the animals died from some mysterious way seemed to be imitating suicide. For example, if an aquatic animal to leave the initiative to aquatic environments in the eyes of ordinary people as extremely suicide.
But experts tend to see such behavior attributed stranded like illness, injury, or disoriented elderly, among other factors. There may be stranded whales as predators imminence venture into dangerous shoals, pursued them to escape predators, or are at risk and accompanying predators, they finally found themselves He was stranded.
Another well-known phenomenon is self-injurious behavior. The real reason for self-injurious behavior is not yet clear, it may be due to different situations and there are differences, but the underlying factors include stress, isolation, fear, disease, malnutrition and tired. For example, birds may pull out some or all of their feathers, and sometimes after a light peck at their feathers, will continue to peck at his own flesh. Primates may bite themselves, cats and dogs will be excessive licking.
These actions are thought to be used to produce a sense of calm to help animals cope with their situation, but depending on their severity, may threaten the health of their own animals. The first step is usually to check for potential physical condition that may become stimuli such behavior occurs. From there, we need to take the appropriate steps to remedy any additional factors that could cause deterioration of the situation.
(The answer from finishing HowStuffWorks)
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