An electronic animal identification ear tag. A self powered transponder is encased in a plastic housing, and the housing is affixed to a one piece metal ear clip. The ear clip has self clinching provisions that are metal only, and the housing has a bubble opening therein to accommodate the closure of the self clinching means. The self clinching locking means and, in a first embodiment, a retaining tooth formed on a leg of said metal ear clip maintain the position of the sleeve on said metal ear clip. In the first embodiment, the housing is a sleeve sliding onto the metal ear clip, while a second embodiment has the housing formed and molded around the metal ear clip.