Terri, I found this site which was developed to help ID nests and eggs that show up in bluebird nest boxes: http://www.sialis.org/nests.htm Tom Sykes (presently in Dale, WI Outagamie County) sykes@xxxxxxxxxx On May 17, 2010, at 8:50 AM, Terri Welisek wrote: > A pair of tree swallows are believed to be nesting in a bluebird box in Mt > Calvary, WI, FondDuLac County. The nest is lined with feathers. There are 3 > white eggs. But here's where the id goes weird. The eggs are sooooo tiny > like the size of hummingbird eggs. I was certain my friend had put jelly > belly beans in there as a joke. But no. What causes an egg to be so > malformed? Or is there another cavity nester that has taken over the site? > > > Good Birding, > > > > Terri Welisek > > Sherwood, WI > > Calumet County > > > > > > #################### > You received this email because you are subscribed to the Wisconsin Birding > Network (Wisbirdn). > To UNSUBSCRIBE or SUBSCRIBE, use the Wisbirdn web interface at: > //www.freelists.org/list/wisbirdn. > To set DIGEST or VACATION modes, use the Wisbirdn web interface at: > //www.freelists.org/list/wisbirdn. > Visit Wisbirdn ARCHIVES at: //www.freelists.org/archives/wisbirdn. > > #################### You received this email because you are subscribed to the Wisconsin Birding Network (Wisbirdn). To UNSUBSCRIBE or SUBSCRIBE, use the Wisbirdn web interface at: //www.freelists.org/list/wisbirdn. To set DIGEST or VACATION modes, use the Wisbirdn web interface at: //www.freelists.org/list/wisbirdn. Visit Wisbirdn ARCHIVES at: //www.freelists.org/archives/wisbirdn.