What form of tagging is commonly associated with swine slaughter identification?

USDA back tags are the form of tagging that is most commonly associated with the identification of swine at the time of slaughter. These tags serve multiple purposes, including tracking the animals through the slaughter process and ensuring traceability for food safety and quality assurance. The use of back tags allows officials to easily identify individual animals, which is critical for maintaining accurate records and complying with regulatory requirements.

In contrast, cattle ear tags are specifically designed for cattle and do not apply to swine. Livestock brands, while used in some contexts for identification, are primarily associated with cattle and do not serve the functional requirements needed in swine processing. Species identification bands can be utilized for various types of livestock, but they are not as specifically aligned with the needs of tracking swine during slaughter as USDA back tags are. Thus, the choice of USDA back tags is directly linked to the standards and practices involved in swine slaughter identification.