The marker described was used to mark ring-necked pheasants (Phasianus torquatus) individually. It consisted of a silver-plated #2 surgical safety-pin, at each end of which was attached, with rustproof wire, a 1.5 inch x 3.5 inch tag, made of two thicknesses of "Koroseal", a rubber film. In marking, the pin was thrust through a small pinch of the loose skin at the base of the bird''s neck, dorsally, and snapped shut. Records on penned and wild birds indicated that probably no physiological or psychological harm results from such marking. The rubber film used is subject to tearing, suggesting substitution of some tougher material.