THE MALE PLUMAGE VARIABILITY AND THE STRA TEGY OF ATTRACTING A FEMALE- THE ESTIMATION OF THE ADVERTISING BEHAVIORS SPATIAL-ORGANIZATION INBRIGHTLY AND CRYPTICALLY COLORED PIED FLYCATCHER MALES (FICEDULA-HYPOLEUCA, PASSERIFORMES AVES)

It was demonstrated that brightly and cryptically coloured pied flycat cher males have alternative strategies of the advertising behavior. Br ightly coloured males prefer singing in an open locality, close to a n est box. The singing activity of cryptically coloured males has an eve n distribution in an area. These traits of the advertising behavior ar e connected with differences in a chosen areas' structure. Analysis of the vegetation structure at 147 males' areas showed, that 9 parameter s from 33 were significantly correlated with the colouring types. All of them were connected with open space volume in an area or near it. T he most important dividing factors for brightly and cryptically colour ed birds appeared to be the square of lawn in front of a nest box and the thickness of vegetation around it. Brightly coloured males, unlike cryptically coloured ones, prefer open nest boxes and a wide open spa ce before it. The differences in micromosaics of differently coloured males' areas respond to the males' requirements to an area as a medium for the advertising behaviour and not to an area's trophic characteri stics.