| 1 | Yan incubation mother, Yan-hung about 20 days, hatched Since then it swallows flying in the corridor, called 4 murmured the old nest to wait for feeding. | |
| 2 | The mother was there, spreading her wings like a fan over her brood; the father fluttered about, flew away, then came back, bearing in his beak food and kisses. |