This is Gertrude, my Vine­ga­roon (Mastigo­proc­tus gi­gan­teus.) She comes from the Chir­ic­ahua Moun­tains of Ari­zona. She us­es her sen­si­tive tail and two an­ten­ni­form front legs to hunt in­sects and arach­nids at night. At the base of her tail is a gland that can ex­pel a mix­ture of con­cen­trat­ed acetic acid (vine­gar) and caprylic acid. While caprylic acid is not as strong as the acetic, it nev­er­the­less can dis­solve chitin, a main in­gre­di­ent in arthro­pod shells. I don't know the name of this song.