With experience, people can tell bears apart

Studying the social interaction of bears through the use of camera traps and visual observations requires that humans be able to tell individuals apart. A study done using volunteers to study the vulnerable Andean bear indicates that people can learn to identify individual bears, given a little practice. The research, done by San Diego Zoo conservationists with international collaborators using photos spanning many years, also indicates that young bears usually retain many of their unique markings as they grow older.

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