In the first enclosure there was a great grey owl (Strix nebulosa). The Ark has two of these ... I seem to recall that they're both male but to be honest I can't remember about this first one. (This is the adult; there is also a juvenile at the moment, he's being kept in another enclosure elsewhere in the park.) At first we couldn't see him (maybe her?) and we figured he must be sleeping in one of the shelters in the enclosure, but suddenly KAS spotted him. Another 'wow' moment. :-)
The next enclosure was set aside for the snowy owl (Bubo scandiacus). The Ark has two of these beautiful animals, a breeding pair. This is the male. The sexes of this species are easy to tell apart. The male, as seen here, is almost completely white ...
... while the female, below, is speckled white and brown. She is much more stationary than the male as she is the one who cares for the eggs and the young, and so her camouflage is adapted to this.
She was absolutely beautiful. Even with us so close she was completely calm and serene. She seemed surprisingly awake and alert, and showed us her striking yellow eyes and shiny black beak. A very beautiful bird.
(Photo credit: top and bottom: KAS; middle two: me)