{"fact":"The presence of humans can influence crow behavior, potentially affecting their vocalizations and other actions.","context":"However, little research has been conducted on the nature of calling in these noisy aggregations, partly because the presence of human observers can cause crows to change their calling behavior (Parr, 1997; Tarter, 2008).","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":508}