{"fact":"American crows can be identified by their unique caw calls, even when the situation they're calling in is unknown.","context":"The identity of American crows can be inferred from their calls, with accuracy significantly above chance (24% vs 6%), using a common set of parameters across all ‘caw’-type calls. This implies that callers can be identified even when the behavioural context of their calls is unknown, at least if the set of possible candidates is small.","source":"Exu Anton Mates; Robin R. Tarter; James C. Ha; Anne B. Clark; Kevin J. McGowan, Acoustic profiling in a complexly social species, the American crow: caws encode information on caller sex, identity and behavioural context, 10.1080/09524622.2014.933446","index":248}