The myth of Crane has been studied by M. Renard and G. Dumezil. The first scholar sees in it a sort of parallel with the theology underlying the rite of the Tigillum Sororium. Crane is a nymph of the sacred wood of Helernus, located at the issue of the Tiber, whose festival of 1 February corresponded with that of Juno Sospita: Crane might be seen as a minor "imago" of the goddess. Her habit of deceiving her male pursuers by hiding in crags in the soil reveals her association not only with vegetation but also with rocks, caverns, and underpassages. Her nature looks to be also associated with vegetation and nurture: G. Dumezil has proved that Helernus was a god of vegetation, vegetative lushness and orchards, particularly associated with vetch. As Ovid writes in his "Fasti", 1 June was the festival day of Carna, besides being the calendary festival of the month of Juno and the festival of Juno Moneta. Ovid seems to purposefully conflate and identify Carna with Cardea in the aetiologic myth related above. Consequently, the association of both Janus and the god Helernus with Carna-Crane is highlighted in this myth: it was customary on that day to eat ivetch (mashed beans) and lard, which were supposed to strengthen the body. Cardea had also magic powers for protecting doorways (by touching thresholds and posts with wet hawthorn twigs) and newborn children by the aggression of the striges (in the myth the young Proca). M. Renard sees the association of Janus with Crane as reminiscent of widespread rites of lustration and fertility performed through ritual walking under low crags or holes in the soil or natural hollows in trees, which in turn are reflected in the lustrative rite of the Tigillum Sororium.