{"fact":"Crows use a specific call, the 'ka' call, to keep in touch with each other, especially in large, noisy environments where it's hard to see.","context":"In such a socio-ecology, jungle crows frequently use vocal contact for inter-individual communication…One type of vocalization, referred to as the ka call, is thought to play a major role as a contact call due to its involvement in vocal exchange within mated pairs and in social gatherings.","source":"None Watanabe; None Izawa; None Kondo, Perceptual mechanism for vocal individual recognition in jungle crows (Corvus macrorhynchos): contact call signature and discrimination, 10.1163/000579510x505427","index":339}