Trait | Male | Female |
---|---|---|
Tarsus length | + | − |
Wing length | + | − |
Age | +At middle age classes −At yearling and old ages | −At middle age classes +At yearling and old ages |
Male’s black plumage (dorsal) | + | NA |
Male’s forehead patch size | + | NA |
Number of neighbours | − | + |
Local breeding date | + | − |