Fig. 4. Take-off speed correlates with distance from the later point of prey impact. (A-C) The speed values determined within the first (A), second (B) and third (C) 20 ms interval after the fish has executed its initial rapid turn and starts moving in the direction of the predicted later point of impact while the fly is still falling. In each case the correlation is highly significant (P<0.0001; r²=0.20, 0.33 and 0.21 in A-C, respectively).