{"fact":"Crows can produce a range of calls, each potentially serving a distinct purpose. These calls can vary from single syllables to complex, structured patterns with up to seven syllables!","context":"A complete caw call is normally comprised of one to seven individual caw syllables.","source":"Shima H. Abadi; Douglas W. Wacker; Jeremy G. Newton; Derek Flett, Acoustic localization of crows in pre-roost aggregations., 10.1121/1.5138133","index":507}