Electronic button tag for tagging and identifying cattle

An animal tagging and identification electronic button tag comprising a transponder arranged to uniquely identify an animal in a group of animals, capable of being programmed, enclosed in a shell, said shell comprising a blind axial transverse passage for receiving a punch of a male tag panel to fix the shell to an ear of the animal, wherein the shell is made from two half-shells namely a lower half-shell and an upper half-shell, which are assembled together at a median plane which is disposed transversely to the axial transverse passage, and the transponder is enclosed within the two half-shells;

• wherein the upper half-shell comprises a sleeve with a blind central opening around the median axis, which opening forms part of the axial transverse passage of the shell, the sleeve being formed by a cylindrical wall which projects from a planar wall of the upper half-shell and is extended by an inner cylindrical wall below said planar wall to connect with a corresponding inner cylindrical wall on the lower half-shell, the planar wall of the upper half-shell being connected at its periphery to an outer cylindrical wall for connection to the lower half-shell;
• and
• wherein the inner cylindrical wall of the lower half-shell has an opening with a conical form, which opening forms part of the axial transverse passage of the shell, and an upper shoulder enabling a tip of the punch of a male panel tag to be locked into the shell.