Click on image to view larger version.

Fig. 2. Evidence that the path of the dislodged prey followed the rules of simple
ballistics, with negligible air resistance and initial vertical velocity. For
each of the two initial prey heights h used in this study,
h=20 cm (left; N=43 shots) and h=40 cm (right;
N=50 shots), the horizontal distance d travelled by the prey
is plotted as a function of its initial horizontal velocity
hor. Dotted lines show the distance
d=
hor(2h/g)1/2 (g=9.81
ms-2) predicted, assuming that there were no frictional effects and
no initial vertical velocity.