For mammals, birds and reptiles?
These things are used on a wide variety of animals, ranging from mice, squirrels, rats, moles, snakes, geckos, sparrows, pigeons, etc. It has been known people use them on feral cats, possums and raccoons too. Here are some pictures to illustrate the point: (click at your own discretion, they're not particularly nice)
https://secure.peta.org/images/Thumb...ionAlerts/5149
http://www.wrcmn.org/pulse/wp-conten...owglue1www.jpg
http://cdn2-b.examiner.com/sites/def...?itok=YJebECQV
http://i.dailymail.co.uk/i/pix/2012/...68_634x465.jpg
Thankfully, there is a way to get them out without harm:
What do you think about these kinds of trap? Repulsive, inhumane and unneeded? Or something that works well?
Those who have used these things - why did you use them? How do you deal with an animal that is still alive on them? Would you use them again?
I've had experience with these traps before, I have rescued many animals from them. Only last week someone bought in a sparrow (I work at a wildlife rehab place), he must have been there for a short time because his feathers were mostly intact. We extracted him unharmed. Not all animals are this lucky, because it appears that the common theme with these traps is that people set them and either do not check them frequently, or catch an animal that is distressed and in pain, and simply throw it into the garbage. Never mind the fact that there's a live animal still on it, which struggle so much as to break or tear/chew off body appendages. And if they don't die from that, they die of dehydration/starvation. It's almost akin to a crucifixion. That's why I support measures to outlaw these traps... there are better alternatives out there that don't involve this kind of torture.
If someone has to use these traps... please please please check them frequently and humanely dispatch the animal caught. If it's an unintended animal that is trapped, you can release it with vegetable. These traps should not be used at all if people will not be responsible enough to administer the coup de grace in a timely manner.