Sexing of two monochromatic species. Morphometrical comparison and temporal
distribution analysis during migrations
We analysed morphometric characteristics and blood samples of 163 Garden Warblers
Sylvia borin during the post-breeding migration and of 96 Robins Erithacus
rubecula in various periods of the year; the aim was to find the distribution between
males and females and to find relations between sex and some morphometric parameters.
Birds were caught in two birding stations in Friuli Venezia Giulia from 2007
to 2009. We founded significative correlation between the length of wings and sex;
for the Robin species this relation was very strong and the interval of measures of the
total wing length, obtained from the sex determination, seems to be useful for distinguish
males from females.
