Joseph Cornell's Aviary series. The parrots in the first ATC above are the same ones Cornell used in The Caliph of Bagdad and Untitled (Parrot and Butterfly Habitat). You can see these and other Cornell parrot boxes grouped together in this great post at the Kiwi's Angels parrot blog.
Patti's Parrots Faux Postage from Ten Two Studios and some vintage text glued to some serendipity collage backgrounds. Then I gessoed around the parrots to blend everything together and create the weathered white painted surface that Cornell had in his Aviary boxes. Then I added punchinella (sequin waste) to suggest bits of cage wire. The round things are the plastic labels removed from tabulating machines (a craft supply shared with our ATC group by one of our many generous members), and I also had some old air mail stickers.