11. Ducks usually lay their eggs at night and in the morning . 12. The female commences laying eggs about the middle of March . 13. After the eggs are laid , she plugs the hole of the burial chamber . 14. If she does not lick her eggs , they fail to hatch . 15. Usually they are incubated the same way as hen eggs . 16. The eggs weigh nearly 85 grams each . 17. In the case of eggs of the Muscovy duck , the incubation period is 35 days . 18. The average egg production is 75 eggs in the first year . 19. The eggs are laid in a mass in soil . 20. Turkey eggs take 28 days to hatch .
