1. "Eicha", "Margrit", "Camillo" and "Camilla", the first bonobos, who came to Frankfurt Zoo in 1955 and 1959, were used to be property of the RZS of Antwerp.
I think, in the meantime, Margrit is supposed to be property of the Frankfurt Zoo. The offspring is definitely owned by Frankfurt.
The ownership structure of bonobos is very complicated, for example the Milwaukee bonbos:
Name Status
0,1 Maringa Purchase from Wassenaar (Owner: Milwaukee)
1,0 Lomako Purchase from Wassenaar (Owner: Milwaukee)
0,1 Kitty Loan from Antwerp (Owner: Antwerp)
1,0 Lody Purchase from Wassenaar (Owner: Milwaukee)
1,0 Murph Donation from Yerkes (Owner: Milwaukee)
0,1 Laura Loan from San Diego Zoo (Owner: San Diego Zoo)
0,1 Linda Loan from San Diego Zoo (Owner: San Diego Zoo)
1,0 Makanza Loan from San Diego Zoo (Owner: San Diego Zoo)
1,0 Brian Loan from San Diego Zoo (Owner: San Diego Zoo)
0,1 Zanga Mokila Birth at Milwaukee (Owner: San Diego Zoo)
0,1 Zomi II Birth at Milwaukee (Owner: Milwaukee)
1,0 Zuri Loan from Frankfurt (Owner: Frankfurt)
1,0 Viaje Loan from Zoofari (Owner: Zoofari)
0,1 Claudine Birth at Milwaukee (Owner: Milwaukee)
0,1 Deidre Birth at Milwaukee (Owner: Milwaukee)
0,1 Tamia Loan from Columbus (Owner: Columbus)
0,1 Faith Birth at Milwaukee (Owner: Milwaukee)
0,1 Hanna Birth at Milwaukee (Owner: Columbus)
_________________________________________________________________
0,1 Ana Neema Donation from Yerkes (Owner: Milwaukee or Columbus)
1,0 Bila Isia Birth at Milwaukee (Owner: Milwaukee or Columbus)
0,1 Gilda Birth at Milwaukee (Owner: Milwaukee or Columbus)
0,1 Kosana Donation from Planckendael (Death: 05.04.2007)
2. The small outdoorn cage at Basel is only for the Chimps....