Yes they do... They hear the click as well as the flash. All I can say is get the better cameras, hide them well or lock them up. You will not be disappointed. The amount of camera's I run all year is really excessive but once I changed to the black out type and the silent cameras, my numbers increased as well as quality of mature bucks that they will capture. I know it is a small click, and the infrared is just a small flash, but educating them to anything out of the ordinary will diminish your chances of getting those cagy old bucks and seasoned does on camera... I have seen it from the stand, the sound just trips them out! I have been having really great luck with the WG Vision extremes and the new Mirages. No flash, no clicks, no problems. Good luck!
UBP Life Member
Full Sunday Hunting Supporter
Beyond Century mark in Bow kills.