This is a half-hatched duck egg, I am peeling this egg shell so half the duck body is visible.
Initially I felt scared to peel the shell of this duck egg because I had experience when my duck mother first lay eggs and incubate my own eggs that peeled the duck egg slowly, but I made a mistake, the eggs that I peeled and I open the shell not yet to hatch had to wait another day, which in the end the duck that I forced peeled egg shell to release a lot of blood and stomach still not closed perfectly until he died after 2 hours.
I am very sorry for the incident, but today I do the same thing that is opening egg shells that have been slightly perforated and only seen the mouth of the duck but I did not fail as the first time this experience I hatch this baby safely.
My video is at DLive