@Antoine Havent seen Ostrava yet, but definately higher and bit bigger than Nuremberg. Helsinki has one more, smaller exhibit with one black individual.
@twilighter The dark individual living in it was a young bearded vulture, whose parents - the two birds in the bigger aviary - had kicked her out of their home after she grew up She lived in the small aviary (which was originally a raccoon enclosure) for few months, until she moved to Tierpark Goldau in Swizerland.