Table 2.

Detailed results of prey movements during PCAs.

PCA	nprey_movement	nantenna_return_stroke	nantenna_downstroke	nantenna_asynchronous	Prey position and orientation during trap triggering: 1) Position inside the trap 2) Body orientation relative to midrib 3) Orientation of head	Trap triggering by:	Prey age
1	8	4	3	1	1) One-layered region 2) Inclined, more or less orthogonal 3) Trap-inwardly	Second antennae return stroke	3 days
2	5	2	1	2	1) One-layered region 2) Orthogonal 3) Trap-inwardly	Asynchronous second antennae movement	5-6 days
3	20	6	6	8	1) Between one- and three-layered region 2) Orthogonal 3) Trap-inwardly	Second antennae downstroke	3 days
4	11	2	3	6	1) Trap margin 2) Transverse; ventral side is oriented trap-inwardly	Asynchronous second antennae movement	6 days
5	8	3	4	1	1) Between one- and three-layered region 2) Oriented obliquely along midrib 3) Trap-outwardly	Second antennae downstroke	6 days
6	10	3	3	4	1) One-layered region 2) Oriented obliquely along midrib 3) Trap-inwardly	Asynchronous second antennae movement	6 days
7	8	2	1	5	1) Trap margin 2) Transverse; ventral side is oriented trap-inwardly	Asynchronous second antennae movement	6 days
8	2	1	1	–	1) Between one- and three-layered region 2) Inclined, more or less orthogonal 3) Trap-inwardly	Second antennae return stroke	4 days
9	11	3	4	4	1) Trap margin 2) Transverse; ventral side is oriented trap-inwardly	Second antennae downstroke	6 days
10	8	4	3	1	1) Trap margin, partly outside of trap 2) Orthogonal 3) Trap-inwardly	Asynchronous second antennae movement	6 days
11	12	5	4	3	1) Trap margin; almost completely outside of trap 2) Orthogonal 3) Trap-outwardly	Tail spine wobbling	3 days
12	8	1	1	6	1) Trap margin 2) Transverse; lateral body sides are oriented trap-in- and outwardly	Asynchronous second antennae movement	6 days
13	5	2	1	2	1) Trap margin 2) Parallel; ventral side is oriented trap-outwardly	Second antennae return stroke	unknown F1
14	10	3	3	4	1) Trap margin; during the onset of trap closure, the prey is completely outside of the trap 2) Parallel; ventral side is oriented trap-inwardly	Water movement caused by second antennae downstroke	6 days

PCAs were grouped according to their successful or unsuccessful outcome, so that the sequence presented is not in the same chronological order as in the actual experiments. Abbreviations: n_{prey_movement} = total number of prey movements during the respective PCA; n_{antenna_return_stroke} = number of second antennae return strokes during the respective PCA; n_{antenna_downstroke} = number of second antennae downstrokes during the respective PCA; n_{antenna_asynchronous} = number of asynchronous second antennae movements during the respective PCA.