He has a spontaneous tendency to do certain things, such as building a nest, singing, etc.; but he is not able to do these things adequately or perfectly if left to himself from birth.

This sort of endowment with imperfect instincts has been the field of some of the most interesting research in animal psychology, and has led to a new view of the relation of instinct to intelligence.
3.

It has been found that young animals, birds, etc., depend upon the example and instruction of adults for the first performance of many actions that seem to be instinctive.

This dependence may exist even in cases in which there is yet a congenital tendency to perform the action.

Many birds, for example, have a general instinct to build a nest; but in many cases, if put in artificial circumstances, they build imperfect nests.