{"fact":"Crows at the Vienna Zoo show a preference for non-meat items from zoo animal diets over meat and human leftovers.","context":"Over 100 scan observation rounds, using the mean frequency of observations for each food type per round, the crows were found to frequently exploit food provided for the Zoo animals: eating non-meat items from these diets more than meat…or human leftovers.","source":"Rachael Miller; Martina Schiestl; Andrew Whiten; Christine Schwab; Thomas Bugnyar, Tolerance and Social Facilitation in the Foraging Behaviour of Free-Ranging Crows (Corvus corone corone; C. c. cornix)., 10.1111/eth.12298","index":570}