DRYAD READ ME Supplemental data and scripts to accompany Zhang et al. (2022) "A novel catapult mechanism for male spiders to avoid sexual cannibalism" published in Current Biology. Dryad submission contents: file name: Description: 1. Function of catapulting behavior To investigate the function of the catapulting 2. Catapulting blocking experiment To examine once the catapulting was blocked, whether male was cannibalized or not 3. Safety line remove experiment To examine whether the safty line plays any roles in the catapulting 4. Dragline silk extrusion block To further confirm the function of the safty line in the catapulting 5. Kinematic parameters calculation Kinematic parameters data that calculated from 5 high speed video footages that recorded catapulting 6. One foreleg was removed To investigate the importance of the foreleg in the mating and catapulting 7. Both forelegs were removed To investigate the importance of the foreleg in the mating and catapulting 8. Randomly remove one leg To investigate whether male can mate and catapult when remove one of the other six legs besides forelegs 9. Randomly remove two legs To investigate whether male can mate and catapult when remove two of the other six legs besides forelegs 10. Theca damage experiment To investigate whether male can mate and catapult after damaging the theca in the tibia-metatarsus joint 11. Theca area and leg length To investigate the differences of the surface area of the theca in the tibia-metatarsus joint among four legs, and the correlation between the surface area of the thecae and the length of spider legs. 12. Python code Python code that was wrote in Python tool Spyder, it was used to calculate the kinematic parameters of catapulting