I wouldn't worry yet. Some birds don't settle on the nest to incubate until several, or all, of the eggs have been laid. They make you wonder sometimes, the nesting places birds choose. But if you have been using the front door while they were selecting, they may not be as sensitive as you fear. But if you do have the kitchen door alternate, that will lower their stress levels, especially if there is heavy use.

Thank you for your response. Kitchen door is no problem. Do you know the time frame for laying all of the eggs?

They usually lay one egg per day, until there are roughly 6 (it varies some among the different wren species).

Carolina Wren update: Mommy Wren did return and there are a total of 4 eggs. I've been using the kitchen door with occasional use of the front door. This little lady is not afraid of me at all. I will softly talk to her, when I do go out that door, and I see no fear or nervousness in her eyes. I am anticipating babies any day now.

This wren couple has been here since I moved in 4+ years ago. This will be my 5th Spring with them. The wheel well above my car's front tire has always been a spot they've picked for a potential nest. Its been a bit of a game with us. Every morning I would go out and remove the nest. By the time I woke up the next morning another would be in its place. Last Spring they chose a nest they built in a small storage shed by the kitchen door. Unfortunately, a snake got the eggs within 3 days.

The Christmas Cactus that she is nesting in is one of a pair. They are equal distance from the edge of the wooden plant stand they are on. The stand is 3 ft high. They chose to build in the plant that is closest to the door. There had to be a reason for that.

Thank you for all of your help.

Carolina wrens are amongst the easiest birds to become friends with. With patience, they will feed out of your hand. I've had them take a bath in my cupped hand, filled with water.

Enjoy your experience.