Two fresh blue/green Silver Ameraucana eggs this morning and it's in the 40's today

We're raising the blue/green egglaying Silver Ameraucanas and the dark brown speckled egglaying French Black Copper Marans. Eggs for hatching should be collected as soon as possible when it's cold outside. Temperatures less than 45°F can kill the embryo. The unwashed fertile eggs are then stored in the upright position at room temperature and turned over to the opposite end at least once a day until placed in the incubator. Planning to save at least 12 of the darkest eggs to start.