Good to see that Guadalajara zoo now also has this very endangered species, along with zoomat, leon zoo, and africam safari puebla in Mexico and St. Louis in the U.S.
I have not been to the Guadalajara zoo in more than a decade, so i greatly enjoyed your pictures, adam.
The Horned Guans have been there for quite a while, actually. I've heard some ornithologists consider it- and the queztal- something like the Holy Grail of birding in Mexico; so rare it's almost a miracle to see one in the jungle.