Probably one of the most complex and elegant bird nest is build by Weaver bird.....see it for yourself.....
BBC Home Making: Weaver Bird
Casal de João-de-barro construindo ninho.
Beautiful wild birds: The parent birds feeding their young birds #1
Breeding Birds of Tatamá - Colombia
Vogelkop Bowerbird, Hüttengärtner
6 Most Beautiful Birds In The World Include Peafowl
Tailorbird nesting story....
Los nidos más asombrosos del mundo animal