From:  Wilman Nunez

The first 2 pictures are of the Ovenbird nests. The second looks like 2 floors. It’s really a new nest on top of an old one, very rarely they do that. Nest is abandoned once the chicks are gone. They look like robins only a bit smaller.

Fourth pic is downtown Bougainville - a city just south of Brazil. Just the camera didn’t help and was a bit cloudy that day!

The Ovenbird is a small songbird of the New World warbler family. This migratory bird breeds in eastern North America and winters in Central America, many Caribbean islands, Florida and northern Venezuela.