If there's anyone following the horrific situation at the Dallas Zoo but is maybe confused with the order in which exhibits are being targeted, allow me to explain. Below is a photo of the full map
The zoo is split into 5 sections. There's the main entrance, from which you can go to either The Wilds of Africa, which branches down to Giants of The Savanna, or you can go to Zoo North, which branches down into the Children's Zoo.
It might be worth it to acknowledge as well that Zoo North is the Oldest section of the Zoo, and has undergone renovations in the past few years to better facilitate the animals there.
Every Incident thus far has occurred in Zoo North.
Most incidents thus far have occurred in Zoo North.
EDIT: The markings on this map are incorrect. The Vulture, Pin, was a Lappet Faced Vulture, and was housed not in Wings of Wonder but in the Vulture exhibit in The Wilds of Africa.
The first incident of tampering was in the clouded leopard enclosure. This one made the news, people laughed at the zoo over it, but the escaped leopard was found nearby her habitat and was returned without further incident. I'm not sure many people even realized that the reason she escaped was found to be a hoke cut into her enclosure.
The next day, over in Primate Place, the Langur Enclosure was found to be sabotaged with the same hole cut into it. No langurs escaped.
The third incident ended in the death of an animal. Vultures are kept in the Wings of Wonder area. In the Wilds of Africa, the Lappet-Faced Vulture Pin was found by keepers in a compromised enclosure; the vulture was not dead when it was found, but did ultimately pass away. We don't know details, as this marked the start of an active investigation, but the cause of the vulture's state is assumed to be from human interference.
And now we come to yesterday. 2 Emperor Tamarins were found to be missing. Theft is suspected as they cannot be found within the immediate vicinity of their home. Tamarins have their own Tamarin Treetops exhibit that houses multiple species.
The Clouded Leopard exhibit sits right between Primate Place and Tamarin Treetops. Thus far the biggest outlier in many ways is the Vulture, who was across the Zoo North in Wings of Wonder in the Wilds of Africa.
So there is a pattern to the perpatrators' movement and choices thus far. They've mostly been keeping to Zoo North, and seemingly choosing targets that don't spell certain death for them letting them out, nor for returning the animals should they escape.
I want to reiterate that this is an active investigation; the latest incident occurred yesterday. I am horrified at the situation, and I am so sorry to the keepers and security who are trying to do their job and look after these animals.
That said, I do have some speculation that seems pretty obvious from what information we have.