{"fact":"Carrion crows exhibit a heightened fear response to large, unfamiliar structures as they mature into sub-adults, potentially reflecting increased caution in their established environments.","context":"In the structure condition, as juveniles, both species showed a significantly shorter latency to interact with structures than when they were sub-adults... The crows showed a significantly higher frequency of flying back and forth behaviour than ravens as sub-adults.","source":"Rachael Miller; Thomas Bugnyar; Kerstin Pölzl; Christine Schwab, Differences in exploration behaviour in common ravens and carrion crows during development and across social context, 10.1007/s00265-015-1935-8","index":55}