Observational learning
The University of Washington studied this phenomenon with crows: There is a tradeoff between acquiring costly information firsthand and learning that information socially. Using social learning is easier for the individual, but there is a risk of inaccuracy.  The experimenters exposed wild crows to a unique “dangerous face” mask as they trapped, banded, and released 7-15 birds at five different study places around Seattle, WA. An immediate scolding response to the mask after trapping by previously captured crows illustrates that the individual crow learned the danger of that mask. There was a scolding from crows that were captured that had not been captured initially. That response indicates conditioning from the mob of birds that assembled during the capture.