So, briefly, had two days to spare instead of just one:
1. Drove down to Tucson and did the ASDM first. Wonderful place, really, really wonderful. The drive there from the north through the Saguaro Nat'l Park was also very cool.
2. Also fit in the Reid Park Zoo in the same day. The African Elephant Exhibit was very good. The rest varied from good to OK to less than mediocre. I was disappointed at the number of social species where only a lone specimen was exhibited. The breeding success they've had with some species, like Giant Anteaters, is worth noting.
3. The next day saw the Phoenix Zoo. Was pleasantly surprised at its quality. Besides the quality of the collection and most of the exhibits, it's beautifully landscaped. Saw some bird species and a whole bunch of rattlesnakes that I've never seen before. The savannah exhibit struck me as very dry, very dusty, and very unshaded, and I could see only a single giraffe despite going by three times over ~three hours. But overall really liked the zoo.
Didn't see the Bobcats at either ASDM or the Phoenix Zoo. Must be bashful, LOL.