In this July 2, 2016 photo, Shaki, from left to right, Ciro and Buddy, look out from their giraffe enclosure at the former city zoo now known as Eco Parque, in Buenos Aires, Argentina. Developers last July promised to relocate most of the zoo's animals to sanctuaries in Argentina and abroad, but they had made no firm arrangements to do so. (Photo by Natacha Pisarenko/AP Photo)





In this July 8, 2016 photo, a young baboon clings to its mother in their enclosure at the former city zoo now known as Eco Parque in Buenos Aires, Argentina. A year after the zoo closed its doors and was transformed into a park, hundreds of animals remain behind bars and in a noisy limbo. (Photo by Natacha Pisarenko/AP Photo)





This May 16, 2017 photo shows a baboon inside an enclosure at the former city zoo now known as Eco Parque, in Buenos Aires, Argentina. “The enclosures haven't been modified, and obviously, the animals suffer”, said Juan Carlos Sassaroli, a veterinarian who worked at the former zoo. “We want the zoo to be a conservation tool, not a park for walking dogs because we have that already”. (Photo by Natacha Pisarenko/AP Photo)





In this May 16, 2017 photo, baboons huddle inside their enclosure at the former city zoo now known as Eco Parque, in Buenos Aires, Argentina. Developers last July promised to relocate most of the zoo's animals to sanctuaries in Argentina and abroad, but they had made no firm arrangements to do so. And a new master plan announced Tuesday, May 23, 2017, still doesn't specify how they will accomplish it. (Photo by Natacha Pisarenko/AP Photo)





In this May 12, 2017 photo, Pupy, an African elephant, stands in the doorway of his enclosure at the former city zoo now known as Eco Parque in Buenos Aires, Argentina. A year ago the 140-year old Buenos Aires zoo closed its doors and was transformed into a park. The first director decided that the animals should be housed in buildings that reflected their countries of origin. A replica of a Hindu temple was built for the Asian elephants. (Photo by Natacha Pisarenko/AP Photo)





In this May 12, 2017 photo, African elephant Pupy lies on a patch of mud at the former city zoo now known as Eco Parque, in Buenos Aires, Argentina. The three elephants residing at Eco Parque, Mara, Pupy and Cucy, have a lawyer representing them to demand better conditions. (Photo by Natacha Pisarenko/AP Photo)





In this July 15, 2016 photo, Sandra, the orangutan, walks in her enclosure at the former city zoo now known as Eco Parque, in Buenos Aires, Argentina. Sandra became known worldwide when an Argentine court issued a landmark ruling in 2014 that she was entitled to some of the legal rights enjoyed by humans. She's no longer on display for curious visitors. (Photo by Natacha Pisarenko/AP Photo)





This May 16, 2017 photo shows Sandra, the orangutan, inside her enclosure at the former city zoo now known as Eco Parque, in Buenos Aires, Argentina. (Photo by Natacha Pisarenko/AP Photo)





In this July 5, 2016 photo, a tapir rests its hooves on the edge of an opening of an enclosure at the former city zoo now known as Eco Parque, in Buenos Aires, Argentina. Conservationists complain that a year after the transformation from zoo to park, the remaining animals still live in antiquated enclosures widely considered inhumane by modern standards. (Photo by Natacha Pisarenko/AP Photo)





In this May 16, 2017 photo, Sandra, the orangutan, looks out from her enclosure at the former city zoo now known as Eco Parque in Buenos Aires, Argentina. Lions, giraffes and hundreds of other animals remain behind bars and in limbo a year after the former Buenos Aires zoo turned into an ecological park as part of a project to relocate most of its animals to sanctuaries in Argentina and abroad. (Photo by Natacha Pisarenko/AP Photo)





In this July 8, 2016 photo, a spectacled bear lounges in a basket in an enclosure at the former city zoo now known as Eco Parque, in Buenos Aires, Argentina. Experts have concluded that a year after the zoo transformation, the conditions for the animals practically remain the same and there is no concrete plan that maximizes the well-being of the animals. (Photo by Natacha Pisarenko/AP Photo)





In this July 2, 2016 photo, a sea lion catches a fish tossed by a feeder at the former city zoo now known as Eco Parque, in Buenos Aires, Argentina. Some of the stress for animals has been reduced by a cutback in allowed visitors, who in the past could number 10,000 a day. The sea lion shows have been canceled, no longer expected to entertain the public. (Photo by Natacha Pisarenko/AP Photo)





In this May 12, 2017 photo, Guille, the hippopotamus, wades in a pool of water in her enclosure at the former city zoo now known as Eco Parque, in Buenos Aires, Argentina. Developers last July promised to relocate most of the zoo's animals to sanctuaries in Argentina and abroad, but they had made no firm arrangements to do so. (Photo by Natacha Pisarenko/AP Photo)





In this May 16, 2017 photo, a chimpanzee shades his eyes with his hand while sitting in his enclosure at the former city zoo now known as Eco Parque, in Buenos Aires, Argentina. “It's gone from bad to worse”, said Claudio Bertonatti, a former Buenos Aires zoo director. “Everything is set for Noah's Arc to be shipwrecked”. (Photo by Natacha Pisarenko/AP Photo)





In this May 16, 2017 photo, a chimpanzee watches as a worker tosses handfuls of grain into his enclosure, at the former city zoo now known as Eco Parque, in Buenos Aires, Argentina. When Mayor Horacio Rodriguez Larreta announced its closure last year, he said the animals were a “treasure” that couldn't remain in captivity near the noise and pollution. But not a single animal owned by the city has been transferred. (Photo by Natacha Pisarenko/AP Photo)





In this July 15, 2016 photo, Cleo, a female white tiger, jumps on the safety glass of her enclosure reacting to painters working on an improvement project, at the former city zoo now known as Eco Parque, in Buenos Aires, Argentina. In its beginnings, the zoo was inspired on Victorian zoos that exhibited exotic animals. (Photo by Natacha Pisarenko/AP Photo)