28.02.2001 Scientists of Moscow Zoo who breed cranes have found that sex cycles of partners are synchronous in crane couples, so males are capable to mate only in those days when female is also ready for mating.
Cranes are majestic and enigmatic birds.
Relationships between partners in crane families are touching and even wise. For a long time it is known that crane live in couples and remain devoted to each other for the lifetime. If one partner dies, the other will face loneliness or early death. Nest building, brooding, bringing up children are the mutual chores. But these old-fashioned devotion is not always good for survival.