Abstract: An animal ear tag is disclosed which comprises two components and a pin which connects the components to one another and attaches them to the ear of the animal. The tag is constructed so that it is possible to record, on the animal itself, as much information as the farmer requires about it. Projections which can be removed or left in place, edge depressions the remaining material of which can be cut out or left in place, two sets of digital bars and two depressions for receiving colored studs enable the farmer to record as much information as he requires on the animal itself. The advantage of the system is that the information on the tag can be read directly from the tag and it is not necessary for the farmer to return to his office with only an identification number for the animal and then search for the information that he needs.