I thought I be a little devious and transported Yassa's comments re Krefeld Zoo here from the Australian zoos thread. Hope you do not mind! I think the recent resurgence in interest in tree kangaroos in Europe deserves more in depth discussion! 
On ISIS the totals for Dendrolagus goodfellowi are:
Beauval 2.2
Dortmund present does not list its inventory on ISIS
Frankfurt 2.1
Krefeld 2.2
Walsrode present does not list its inventory on ISIS (could be D. matschei)
I second Yassa's question: what is the source of the Dortmund female? Also I add on a few more: to my knowledge a joey each was born at Beauval and Krefeld. This is not reflected in the ISIS totals. Clarification, anyone?
Al, where will Belfast Zoo get its TKs from?
I tried to find some more details about the Goodfellow tree kanagroos in Germany and Melbourne and here is what I found:
Krefeld, Germany:
1. breeding pair:
1,0 Bud
0,1 Summer
both from San Diego, had a couple of joeys, among them
1,0 Wango * 2004 in Krefeld
0,1 Buna * 2006 in Krefeld
Wango is now paired with 0,1 Belisi, born in Melbourne in 2005 (not sure to which pair, probably Bagi x Timika since Loomy is the 2005 joey of Tapini)
So Krefeld has now 2 pairs, one old breeding pair and a young pair, plus one young female.
Dortmund has one young female and is said to get a male this sping (from where?)
Rumors are that Belfast and Wissel (zoo in the Netherlands) are to recieve tree kanagoos this year, not sure from where. One will probably get young female Buna from Krefeld.
On ISIS the totals for Dendrolagus goodfellowi are:
Beauval 2.2
Dortmund present does not list its inventory on ISIS
Frankfurt 2.1
Krefeld 2.2
Walsrode present does not list its inventory on ISIS (could be D. matschei)
I second Yassa's question: what is the source of the Dortmund female? Also I add on a few more: to my knowledge a joey each was born at Beauval and Krefeld. This is not reflected in the ISIS totals. Clarification, anyone?
Al, where will Belfast Zoo get its TKs from?