Duck egg - Dark spot on hatch day 24+ hours after pip? *PICS*

[Echoes]

So, ended up with 4 ducklings. Most of those early pippers didnt make it. Still have the incubator running just incase there are any last minute hatchers, but it's looking like this will be everyone.

 

[RunnerMamaNewby]

Have 6 ducks eggs that pipped. Most of them over 24hrs now into it. ALL of them have not had any progress since the initial first little crack in the egg, which is alittle bit concerning but i'm trying to be patient and give them a bit longer before thinking something is wrong. Anyway, I have one that pipped over 24 hours ago now and within the last hour or so the big end (non pointy end) had started to turn dark. Not sure what to make of it.? Thoughts??? Do I intervene? Any info/tips appreciated!!
Also, should I intervene for any other reason at all anytime soon? Most have been over 24 hours since initial pip. Just a tiny crack in each and then nothing.

I could not get the camera to focus so well for some reason, but this should definitely give you an idea.View attachment 3446139
View attachment 3446138
^^ 2 pics of egg with dark spot where air sac is. Just recently turned dark. You can also see where the duckling started to poke through yesterday just to the right of the upside down '24' on the 2nd picture.

View attachment 3446149
^ pic of normal looking egg (though still 24hrs after pip)


Incubator stayed steady at 99.5 degrees f, and humidity pretty consistently 60%-65%.

Did the egg with the dark spot end up hatching on its own? I have one with a dark spot that I'm concerned about

 

[New duck mommy 2021]

Did the egg with the dark spot end up hatching on its own? I have one with a dark spot that I'm concerned about

Like a bruise ?
Can you post a picture
If it’s a bruise you need ti make a small safety hole in the middle of the bruise then leave the egg be for at least 24 hours
The smsll safety hole will be only as big as a sharpened pencil end
Not big just want air to get in but not dry out the baby