{"fact":"In contrast to the general \"caw\" call, the \"rattle\" call, which is used in mating, is very distinct between different crow species.","context":"I also examined the rattle, a call mediating sexual interactions characterized by marked specific distinctiveness (Goodwin 1986; Laiolo and Rolando 2003b).","source":"Paola Laiolo, Phenotypic similarity in sympatric crow species: Evidence of social convergence?, 10.1111/evo.13195","index":631}