Alpza in is Conservation Newsletter from july 2010, about conservation projects also shows the spix macaw project and says that Brazil dont is owner of the birds that are abroad (maybe olny a part them?) and that they are aware of some birds not registered in the programm, and they estimate that a total amount of 150 macaws in captivity.
Only spanish:
http://www.alpza.com/docs/NEWSLETTER JULIO 2010 pdf.pdf
mmmh interesting, do you know the source of that information (mainly the 150 macaws), this as i thought all birds were known by now (except for the claim of the ACTP on the Swiss birds).
By the way Brazil does own the birds at the Loro Parque, no clue which agreements were made about the young female in Berlin (Brazilian owned male x German owned female).