Conibears still work. Just gotta give 'em a reason to go through.I need the size 18 for grey squirrels. The 24 works for mice and maybe chipmunks. Grey squirrels are an invasive pest in England where the traps are made and people are encouraged to kill as many as they can. I figure DNR people are keeping these out of the US, from watching the videos it looks like you could collect a lot of them in a days time. It's either that or somebody in the trap business here is paying to keep them out.