Even if a cat never goes outside there is need for individual identification in case of accidental escape, disaster, theft, pedigree match, absence of the owner or other occurrences. (cfa.org)
«The cells and fibers of the brain and [spinal] cord must carry some kind of individual identification tags,» he wrote in 1963. (discovermagazine.com)
Spot patterns in whale sharks are unique and long lasting, and provide a method of individual identification through photographs. (sciencedaily.com)