The role of power versus energy in courtship: what is the ‘energetic cost’ of a courtship display?

► There are two widely used definitions of the ‘energetic cost’ of a display.
► Many ‘energetic’ displays do not cost many joules, if their duration is short.
► Short duration displays may entail high power output, and power output may be limited.
► Such displays may showcase the animal's motor performance, including power output capacity.