I did a search and didn't find an answer, I just found a nest that couldn't be more than 2 weeks old, however not knowing how long eggs can sit on the nest before they become unedible, I looked at them with a flashlight and 4 of the 7 eggs I found have a dark spot in them that's about the size of a quarter, the rest have the same consistancy of light thoughout the entire egg. I don't know what I'm looking for anyway, but is the dark spot the fetus??? Have I hurt the fetus by rolling the eggs some to make sure I wasn't seeing things??? What do I do now??? and are the other eggs edible since there are no dark spots in them??? Sorry for all the questions, I'm still learning.