Can you elaborate on the subspecies division? How is the US population doing?
I don't know the whole story, but I remember seeing in the Fort Worth Zoo gallery a comment saying that Fort Worth's Southern Rockhoppers are Eudyptes chrysocome filholi while the vast majority of southern rockhoppers in US collections are Eudyptes chrysocome chrysocome. the zoo itself doesn't list them at a subspecies level on the signage however
Only two European collections are listed as having E.c. filholi on ZTL, and none for North America. This could be worth updating provided with a relevant source.
here is the post I was referring to, stating that they are filholi. hope this helps, I wonder if asking the zoo for confirmation could also work.
so they are most likely not filholi in that case then?
On the basis of one individual's comment. I suppose the zoo or those managing the studbook do know the origins of their founder birds.
Some additional details: the infant's name is Jameela and she was born to parents, Sekani and Elmo, on January 5th.
A very similar birth and early life story to the Cincinnati Zoo's Fiona the hippo.
Update: Sekani has rejoined the troop and Gracie is being trained to be a surrogate mother to Jameela. Jameela is now thriving, but is still being kept behind the scenes at the moment.