Tiger beetles are such fast runners that they can capture virtually any nonflying insect  However, when running toward an insect, the beetles intermittently stop, and then, a moment later, resume their attack  Perhaps they cannot maintain their pace and must pause for a moment' s rest
but an alternative hypothesis is that while running tiger beetles are unable to process the resulting rapidly changing visual information, and so quickly go blind and stop
The beetles maintain a fixed time interval between pauses, although when an insect that had been stationary begins to flee, the beetle increases its speed after its next pause.