Early Spring, two little birds came to our old newspaper box by the front door and began shoving everything out. Yes, tools, garden gloves, everything got pushed out onto the ground and they began building this amazing nest. You can see some of the materierls...feather, gum wraer, twine.  Then we got back from a long trip and they had no rest. The front door was used to much they left. Those little eggs were left behind.  
I hope they come back next year and we will use the back door until the babies fly away.