This species is often a single pair. 2. the children's father and mother together when it is raised by the match will not be separated from life. Although the pair are dead.
This species often have only one spouse at a time, two of the parents helped to nurture. By that, when paired together, not separate my life. Although the couple is dead
This bird species often have the spouse only had time 2, father and mother to raise. The pair soon will not separate forever. Even if the pair is dead.