Applicator systems for animal tags are disclosed, in particular ear tags and methods of attaching tags to one or more animals using these systems. The applicator systems include a tag magazine (30) and an applicator (1) having a pair of jaws (2,3), the tag magazine is adapted to supply discrete identification tags (31), each comprising a male (33) and female (24) engagement portion, sequentially to the jaws which, upon actuation, engage the male and female portions of the tag through the ear of an animal placed between the jaws. The methods comprise use of these applicator systems to apply one or more tags to animals. The tag magazines also form part of the present disclosure.
