Las "rusalki", ¿ninfas eslavas de las aguas?

In this paper we shall deal with the habitat of the ‘rusalki’, according to contemporary sources of Eastern Slavic oral tradition. Through a selection of such sources, which we offer translated into Spanish, we shall see how in certain regions of Russia, Ukraine, and Byelorussia, it is still believed that the places where the ‘rusalki’ can be seen vary according to the seasons and even the hours of the day. This variation, already attested in earlier sources, makes an important difference among ‘rusalki’ and nymphs, although the first scholars dealing with Slavic mythology tried to define the ‘rusalki’ as Slavic nymphs.