{"fact":"When mobbing a perceived threat, crows maintain a safe distance, perching around the person and sometimes even escorting them for short distances.","context":"Scolding crows maintained a consistent minimum distance of 17.4 m between themselves and the masked person while the mob perched around and moved with, but rarely dove at, the person. Mobs escorted the masked person for distances of 10–100 m before returning to their previous activities.","source":"Heather N. Cornell; John M. Marzluff; Shannon Pecoraro, Social learning spreads knowledge about dangerous humans among American crows, 10.1098/rspb.2011.0957","index":263}