Muscovy duck eggs weren't under Mom last night, now what?

[Cloudview]

This happened on day 18 of their 35 day brooding and overnight it was 65 degrees F. I read that with incubators they may still hatch so I continued to have the duck sit on them and only one did not hatch. And I didn't let my husband put them in at night because that's how she got locked out that night.

 

[sourland]

By day 18 they are fairly durable, and 65F isn't all that low. Well done.