Japan’s wild deer bow to tourists who approach them, but not out of politeness, because they have learned that bowing brings food

The sight has become one of Nara’s most famous tourist experiences: a visitor holds out a special deer cracker, dips their head, and a free-ranging sika deer appears to bow back. It can look like an extraordinary example of animals adopting Japanese etiquette, but researchers who studied the behavior found a more practical explanation.

Raccontata datimesofindia.indiatimes.com