halfpenny
A usually semicircular earmark made in the ear of a livestock animal.
halfpenny: a semicircular ear notch that marks ownership
A halfpenny is a semicircular notch cut into the ear of livestock, typically sheep or cattle, to indicate ownership or flock membership. The cut removes roughly half the thickness of the ear at one point, creating a distinctive mark visible from a distance. This permanent identifier survives the life of the animal and remains legible even after the animal's wool grows long or its hide thickens.
The halfpenny is one of several standard earmarks used across British and European pastoral traditions. Other common variants include the swallow-tail (a V-shaped slit), the under-bit (a notch from the bottom edge), and the crop (removal of the entire ear tip). Farmers often combine multiple marks on each ear to create unique ownership signatures: one notch in the right ear, a different one in the left, allowing a single animal to carry two or three distinct marks simultaneously.
Application and Reading
The halfpenny mark must be made cleanly with a sharp blade or punch when the animal is young, typically within weeks of birth. In sheep, this often coincides with docking and castration. The ear heals quickly, and the notch remains open and visible throughout life. Experienced farmers can read a mixed herd at a glance, identifying animals that have strayed between flocks or detecting theft when unmarked animals appear. The position and size of the halfpenny can vary slightly between regions, and some agricultural societies have maintained registers of local mark patterns.
The term itself comes from the appearance: the removed semicircle resembles the shape of a halfpenny coin, a reference meaningful in agricultural communities where coinage and portable identity marks both served as tokens of value and ownership. This vocabulary is now largely archaic in industrial livestock management, where electronic tags and tattoos have replaced ear marks in many operations, but the practice persists in heritage breeds and remote pastoral systems where technology is impractical or where traditional marks carry legal weight in disputes over animal ownership.