sparrow nest box out of a pair of old boots
House Sparrow's Nest by njchow82, via Flickr
Nest building has started, watched the birds gathering nesting materials in the garden today!
20150903. -- What is it about an animal on a spool of thread? I love them all. Think this one is sewing a nest?
Chipping Sparrow Nest
Four Sparrows on a Twig ....
MITCHELL LONAS - Song Sparrow Nest_ Late Day
Spizella passerina , Chipping Sparrow , East of Sonora Pass 12 July 1959 , California , Mono County, by Sharon Beals
Sparrow's nest (Click to view video)
Nests and eggs that may show up in bluebird nestboxes... Probably only robin and sparrow in my area.