Animal tag microfiche indentification system

A miniature identification tag for securement to a pierced ear of an animal, said tag comprising an inert body portion having a sealed capsule with integral depending stud portion, said body portion being of insignificant size compared to an animal's ear size, means for engaging said stud after said stud is inserted through a pierced ear lobe of an animal to secure thereby said tag on an animal's ear, said engaging means having means for cooperating with said stud and securing said engaging means at one of a plurality of positions along said stud to sandwich an animal's ear between said engaging means and said capsule, said sealed capsule having a container portion and a removable lid portion for said container, said lid having means for securing said lid to said container and means for sealing said lid on said container to preclude thereby moisture entering said container, a miniaturized information moisture sensitive medium having animal identification indicia thereon peculiar to such animal, said medium being stored in said sealed capsule, said identification indicia only being discernable by optical magnification.