First, the pretty. These are red-winged blackbird eggs I found at the edge of a pond while I was stalking a bullfrog.
And now for the nest people probably won’t like. A wasp nest that I found inside a tube bird feeder. Look closely you’ll see eggs attached to the cell walls in several stages of development. When they hatch, wasps catch aphids and other small bugs and feed the larvae.
Easy to remove these nests when they are small. The mother wasp moves along and builds elsewhere. and won’t attack you.
Another view of the eggs.