{"fact":"When crows were followed by a human observer during escape, they chose to flee for a longer time, changed their escape route more often, and were more likely to switch from running to flying.","context":"When birds were being followed during escape, escape durations were the longest, escape trajectory was modified the most during escape, and a larger proportion of individuals changed from terrestrial to aerial escape strategy compared to observations where birds were not followed.","source":"Kunter Tätte; Anders Pape Møller; Raivo Mänd, Corvids exhibit dynamic risk assessment during escape, 10.1016/j.beproc.2019.104017","index":621}