One of the most endangered birds from Uganda, The Crested Cranes found their safety, and hopefully survival of their own species on the Sir Bani Yas Island in the UAE. You're seeing a male and a female; they mate for life. One partner only. Once one of them dies, the other one does too, soon after. Loyalty for life, without any paper or wedding band, putting all human marriage institutions to shame.
Leard more about this amazing bird here: http://in2eastafrica.net/climate-change-threatens-birds/