Supporting Information

Files in this Data Supplement:

Fig. 7. Measurements derived from shrew attacks. (A) Frame from a video sequence of a shrew attack. The attack was defined as a rapid forward movement of the shrew's rostrum toward the cricket. The frame shows the end point of this attack (the most protracted rostrum position), after which the attack subsided. (B) Spatial measurements taken from the "end-point-of-attack" frame. a, thick white line, body axis of the shrew. This axis was determined as the line connecting middle point of the thin white line between the two hind limbs (white x) and the thin white line between the two forelimbs (white x). b, thick white line, rostrum axis of the shrew. This axis was determined as the line connecting the tip of the rostrum (the nose, white x) and middle point of the thin white line between the two ears (white x). c, thick red line, body axis of the cricket. a, angle between the shrew's rostrum b and shrew's body axis a. b, angle between the shrew's rostrum b and cricket's body axis c. Thin red lines, subdivisions of the cricket's body distinguished in our analysis (from upper right to lower left): head, anterior thorax, posterior thorax, anterior abdomen, medial abdomen, and posterior abdomen. Further body parts distinguished were legs, antennas, cerci, and ovipositor. Red x, point of attack, determined as position of ~75% of the interear-nose distance. This attack was rated as being directed to the posterior thorax.

Fig. 8. Shape-manipulated crickets. (A) Added head. (Left) Control crickets (with glue applied to front of the heads). (Right) Shape-manipulated cricket with added head. (B) Added pair of jumping legs. (Left) Control crickets (with glue applied to the thorax/head region). (Right) Shape-manipulated cricket with added pair of jumping legs.

Movie 1. Etruscan shrew prey capture. A shrew attacks multiple crickets in a 7 cm ´ 7 cm arena (real time). At the end of the movie an attack that targets the thorax and a directed corrective turn are shown in slow motion.

Movie 2. Recurrent high precision attacks on cricket legs. Recurrent shrew attacks on the legs of a cricket (real time) are shown. At the end of the movie selected end-of-attack frames are shown as stills.

Movie 3. Shape cues trigger shrew attacks. The movie shows in real time and slow motion the rejection of a control object (a computer chip), a shrew attack on a plastic cricket, and repetitive attacks of another shrew on the plastic cricket.