Iowa City, IA, USA
This picture was taken by my son in Waukee, Iowa. The nest is in his fireplace vent. He has seen a house finch entering and exiting the nest. I have two issues:
1) I think the bigger eggs, including the speckled ones and the almost pure white one, are all house finch eggs. My friend thinks the speckled ones are brown-headed cowbird eggs. What do you think?
2) What in the world is the smaller. beige egg?
Your assistance will be appreciated.