593752 Disclosed is a livestock identification tag (10), suitable for application by a tag applicator. The tag comprises a first body portion (12), a second body portion (14) and a web portion (13) located between the first and second body portions which permits the second body portion to be pivoted relative to the first body portion when the second body portion is pressed by a tag application mechanism of the tag applicator. A first end of the first body portion, nearest the web portion, has a rib (21) which extends transversely across the first body portion which projects upwardly from the surface thereof. A drive member (26) projects from the first body portion and has a drive surface (32) that is driven, in use, by a tag loading mechanism of the tag applicator. An integrally formed projection (16) is provided at the end of the second body portion to engage with, and lock, the free ends of the first and second body portions together.