Posting this graph here as I don't know where else to put it - mods can feel free to move it to a more suitable place if needed.
This is neat, did you create this? I could see a similar graph for other major collections in close proximity (ie Woodland Park Zoo compared to Point Defiance Zoo, Brookfield Zoo compared to Lincoln Park Zoo, Dallas Zoo compared to Fort Worth Zoo, San Diego Zoo compared to San Diego Wild Animal Park, Franklin Park Zoo compared to Stone Zoo etc.) Though there would be likely no overlap, I might add Arizona Sonora Desert Museum compared to Reid Park Zoo.
@UngulateNerd92 I did create this, for my thread about this topic: A Tale of Two Cities: Overlap Species in Nearby Zoos