And while not exactly treasure, this is interesting; a girl feeds crows, the crows, in return, bring her the treasures they find in the neighborhood.
Intriguing.
Link: http://m.bbc.com/news/magazine-31604026
The concept of reciprocity with wild animals. We all know this with cats (the dead mouse, bird, on the doorstep, in the bed), but all in all I prefer the tastes of crows....
UPDATE: And this, related: http://www.hbmpodcast.com/podcast/hbm038-do-crows-mourn-their-dead