Predator-associated vocalizations in North American red squirrels, Tamiasciurus hudsonicus: are alarm calls predator specific?

North American red squirrels are a small-bodied, solitary territorial species that faces a diversity of predators. One report suggested that red squirrels produce two distinct vocalizations to aerial and ground predators: a tonal [`]seet’ and a broadband [`]bark’, respectively. This categorical mapping between alarm call variants and predator classes suggested that red squirrels might manifest […]