Yeah, homebrew means I made them myself.
Judging by the tracks in the snow, the grey and red fox turn tail and get the heck out of dodge when the pic is taken. Not so with the cats. I have multiple pics of the same cat (camera goes off every 10 seconds) on a few diffrent occasions.
Coyotes, by my experience, are the toughest to get pics of. If they even see the camera on the tree, they are outta there, and I have never gotten a second pic of a coyote. Again, judging by the tracks in the snow they get the heck outta dodge when the flash goes off.