 The young couple preferred to live at Maadi close to Wadi Digha where they kept a pet raven and conducted experiments to see if the plumage colours of larks were genetically inherited.They had a daughter whom they named Prinia after a small bird, the Graceful Prinia ("Prinia gracilis").A Graceful Prinia had built a nest in the ventilator of the bell tent that was the Moreaus' first marital home.