【明報專訊】This is an important day for Henrietta's chicks. "Today is Flyday. TGIF," she said. She led her four little ones onto a limb (大樹枝) and explained the marvels (令人驚歎之事) of flight to them. "I'll count backwards, and when I get to one, you must jump," she told them. Looking down, their little hearts sank. If I were a bird, my heart would sink too.