On the earth, almost all living organisms exhibit their specific type of behaviour in response to environmental conditon or external stimuli. Hence, behaviour may be defined as the expression of living organisms or activities shown in response to the stimuli or circumstances. The complexity of behavioural pattern shown by the animals depends upon the degree of complexity of the central nervous system (C.N.S.). So, in vertebrates, the behavioural activities are seen progressively more complex,
actually due to more development of brain. In general, different behavioural activities of the organisms are observed during breeding, feeding, migratory behaviour, finding residence for living or resting, protection from predators and other adverse environmental conditions.
Types of Animal Behaviour
The types of animal behaviour are described below:
1. Innate or Stereotype Behaviour
The behavioural pattern of the organisms develop as a region of inbuilt adaptive mechanism is called innate or stereotype behaviour. This type of behaviour does not need experience or practice from outer environmental conditions. For examples, taxes, reflexes, migratory behaviour, dominance, mating behaviour, territorial behaviour, various social behaviours etc.
2. Learned Behaviour
The behaviour of organisms developed by learning or day by day experience through different environmental circumstances is called learned behaviour. The degree of learned behaviour depends upon the complexity of organization of nervous system. It depends on the memory gained from experiences. For example, dancing, singing, playing, swimming etc.