Hey everyone, just started reading all these posts! Very interesting conversation. To clarify a bit. Rufus was definitely donated.
Also, to an earlier point that the Macaws regularly escape due to the facilities - this is a bit skewed.
Both the Blue and Gold Macaws (Blake and Chico) enjoy free flight out of their cage on a regular basis. As with any animal, it takes alot of work and bond-building to build up their confidence. Every now and then during their supervised free-flight encounters, Chico will get attacked by seagulls (no I'm not joking!) and as a consequence will panic and fly away.
Often he circles right around back to the keeper, but sometimes gets confused and sits up in a tree for a bit until he is coaxed back down.
The debate about hybrids etc. could go round and round, zoos have to try and find a balance between conservation, education, animal welfare etc. My opinion is that having a different breed of Macaw on display is educational and obviously they wouldn't breed from a hybrid.