Unlicensed Domestic Trapping - File this under "only in California": According to official interpretations, house mice fall under recently passed SB 1645, a state law requiring "anybody taking furbearing mammals or non-game animals to purchase a trapping license, available only by paying a fee ($78.50) and passing a fairly complex test." See the article in the SFChron (second item). The new requirement to get licensed before you use a mousetrap was pushed by the Sacramento-based Animal Protection Institute. The Dept. of Fish and Game, though originally opposed, has your license application ready, Ben.