Page "Ethology" Paragraph 12

Other early ethologists, such as Oskar Heinroth and Julian Huxley, instead concentrated on behaviours that can be called instinctive, or natural, in that they occur in all members of a species under specified circumstances.

Their beginning for studying the behaviour of a new species was to construct an ethogram ( a description of the main types of natural behaviour with their frequencies of occurrence ).

This provided an objective, cumulative base of data about behaviour, which subsequent researchers could check and supplement.