A head shot skunk will spray nearly every time. A lungshot skink will spray about 50% of the time.
Skunks spray as a last resort for protection. If you make no fast movements and talk really calmly in a soothing voice, they will usually relax and let you get right up close and cover the trap. A blanket or sheet works better than a tarp – due to the noise a tarp makes.
Once covered, exhaust from a vehicle piped into the contained area will let them expire with no spray. I would imagine that ether(starting fluid) would produce the same effect.
BTW – a skunk needs his front feet to be able to grab something to convulse and spray. I know a fellow that picked one up by the tail to prove this. As it turns out, he is right. It also turned out that it only takes a skunk about 3-4 seconds to realize that it can curl up and grab it’s back feet with its front, thereby negating the fact that its front feet have nothing to grasp…… He didn’t laugh, but it was funny stuff to the rest of us. Very funny stuff.
Tim