The stench - a stomach-churning fusion of feces and putrefying flesh, baked in months of summer heat - was unlike anything the experienced animal rescuer had ever encountered. It overwhelmed her, even though she was in a hazmat suit, with her face hidden behind a respirator mask.
If the smell was revolting, the horrifying scene inside the dilapidated house was even worse: Hundreds of snakes and exotic birds - some of them dead - were packed inside the cluttered, darkened rooms, according to Butler, a facility manager at Rhode Island Parrot Rescue.
Some of the animals were trapped in stacks of bug-infested cages and aquariums; others were hidden beneath rotting piles of trash, cobwebs and debris. In some areas of the house, the floor was carpeted with several inches of urine-soaked refuse, birdseed and desiccated animal remains.
Wherever rescuers turned, it seemed, more suffering awaited.
In one room, a toucan beak was found among the debris. In another, a pillowcase full of snakes was discovered in a drawer, where rescuers estimated it had been for months.
Somehow, those snakes - and close to 50 other serpents - were still alive, though barely. But the 1,500-square-foot house contained more than 100 dead reptiles, many of them stuffed in bags and left to die.
The brightly colored birds - lorries, rare macaws, a laughing kookaburra, cockatoos, parrots and parakeets - had fared no better. Inside cages caked in filth, emaciated creatures had turned to self-mutilation and begun plucking their vibrant plumage. Rescuers found others sitting in piles of excrement more than a foot high, often beside the decomposing carcasses of their cage mates.
"It was terrible, like something from a horror movie," Butler said.
What made it even more disturbing was the identity of the home's owner: Daniel Kopulos, a wildlife conservationist who owned an exotic pet shop in Manhattan.
Kopulos does not have a history of harming animals, investigators say. In fact, he was widely admired as a force for good - a dedicated advocate for endangered birds and other threatened species.
But rescuers said it was the worst case of animal hoarding they've ever known - a case so unsettling that many are struggling to move past what they saw. Butler, for one, said she has had trouble sleeping since the rescue operation at what the local newspaper dubbed the "Weston House of Horrors."
Police say they plan to charge Kopulos with animal cruelty.
Kopulos declined repeated attempts to be interviewed by The Washington Post, but said in a series of brief emails that the case "has destroyed my life, my reputation, and is spilling over to my employees and others that are close to me." People close to him are being harassed by "animal welfare people," he wrote, adding that he worried about the "devastating effects" a story about him might have on his conservation work.
"There is obviously another side to the story," he wrote, without elaborating.
"Behind the reported story is a real person whose life is being destroyed," he added.
Police were called to the home on Sept. 15 for an "odor investigation." Responding officers were so overwhelmed by the noxious air that they had to retreat before calling the Connecticut Department of Energy & Environmental Protection.
"You could compare the smell to a dead body," Weston Police Sgt. Patrick Daubert told The Washington Post. "To enter the home, you had to have a respirator."
Firefighters, health officials, hazardous materials workers, veterinarians and authorities from the state Office of Emergency Management and Homeland Security were eventually called to assist.
Over the course of 12 grueling hours, Butler and other rescuers removed about 220 non-venomous reptiles and birds worth more than $100,000 from the two-bedroom home and a barn-like building on the 3.3-acre property.
There were so many animals, rescuers said, that they had to be transported to facilities in a 34-foot horse trailer.
Police said the 41-year-old Kopulos - who purchased the property in 2009 - was living at the residence, without running water, when the grisly discovery was made. The day authorities arrived, Kopulos told them he planned to spend the night in the house; but he was not allowed inside, and the property is now condemned, authorities say.
Kopulos was perhaps best known as the owner of Fauna, an exotic pet store on Manhattan's Upper West Side. Through the store, he became known as a force for good; in 2011, the New York Times noted that "Fauna's mission is education and conservation. Impulse buyers beware: Mr. Kopulos will sell you a bird only if he approves of you. A mandatory veterinary check-up is built into the price. Not that the birds are ailing: it's further education for owners."
The paper referred to Kopulos as "the soft-spoken bird whisperer," and he even appeared on NBC's "Today" show.
"We are very picky about who gets animals from here," he told the Epoch Times in 2013. "We spend a lot of time speaking to them, we try to meet the entire family."
"I find it more effective to talk to the child than the parents," he added. "It's a long-term commitment. We don't have anything here that lives less than 10-12 years."
The New York Times reported that Fauna had 700 animals in the store at any given time, and there were another 400 "in various stages of being bred, hatched or hand-raised" at Kopulos' home and aviary in Weston. Among that population, the paper reported, were endangered species that Kopulos bred for conservation and not commercial purposes.
Presumably, rescuers said, these were some of the same animals that were found dead and dying at his home earlier this month.
Fauna's Manhattan location has closed. The store was thought to be moving to Yonkers, but calls to the number listed on the Fauna website were not answered, and voicemail messages were not returned. The store's social media accounts have also disappeared.
Photographer Kathryn Elsesser traveled to Guatemala with Kopulos for several weeks in 2012 to document his efforts to teach local veterinarians about macaw husbandry and chick rearing. His goal, she said, was to start a nonprofit to aid scarlet macaw conservation.
Kopulos seemed to care deeply about the birds, Elsesser said. Even minor details - the type of plastic used in the animals' feeders, the best way to mix their food - merited grave concern, she recalled.
"He was very gentle, and he was an amazing teacher," she said. "He was so knowledgeable. He gave off the impression of being someone who was a trained veterinarian. You could tell this was a passion of his."
He never displayed any behavior, she said, that could have hinted at a penchant for hurting animals.
"Not at all," she said. "That was not the Daniel that I knew."
The reasons people begin hoarding wildlife vary, according to the American Society for the Prevention of Cruelty to Animals.
Researchers have linked the practice to obsessive compulsive disorder in the past, but newer theories suggest depression, paranoia and "attachment disorders in conjunction with personality disorders" can play a role.
"Some animal hoarders began collecting after a traumatic event or loss, while others see themselves as 'rescuers' who save animals from lives on the street," the ASPCA reports.
Hoarders come from many backgrounds, in many ages, according to the ASPCA, but they often share one thing in common: "A failure to grasp the severity of their situation."
They also fail to recognize the suffering animals are experiencing in their care, the ASPCA says.
"Research shows many hoarders are beginning to set themselves up as 'rescue shelters,' complete with non-profit status. They may appear to be sensible people, persuasively conveying their love for animals and readiness to take those who are sick and with special needs."
Valerie Ashley, the director of Rhode Island Parrot Rescue. said it's hard to understand how a wildlife lover could relegate "some of the most beautiful birds on the planet" to filthy chicken-wire cages and bug-infested breeder boxes. Given the animals' intelligence and their need for stimulation, Ashley compared the treatment to putting a special needs child in solitary confinement - for months.
"How can a human being live in a house with animals dying around them?" she asked. "Maybe he's a monster or maybe he was dealing with depression. . . . But I know people who even at their worst can still say, 'Please take care of my animal or my child because I can't do it.'
"Instead, he just walked away and let them starve."
Five of the birds, out of a total of 118 rescued by Rhode Island Parrot Rescue, have since died - and it will take months to nurse the others back to mental and physical health, Ashley said. Even more animals were removed from the property by other New England rescue groups.
In the press, Kopulos portrayed himself as an environmentally conscious business owner with a life-long love of wildlife. He told the Epoch Times that he was raised on a farm in Nashville, where he began caring for injured raccoons and squirrels at any early age. He said he got his first bird when he was 11 and began breeding them a year later.
"Every since I was little, I always knew I was innately drawn to animals," he told the newspaper. "Birds are so intelligent and emotionally driven. They're very connected, when a bird chooses you that's a very special thing."
Kopulos told the New York Times that when he was 12, he rescued a macaw named Patches from a Tennessee pet store. More than three decades later, the same bird could be found at Fauna, riding on the shoulders of employees "like a feathered hood ornament."
Rescuers said they do not know what happened to Patches or whether he's among the massive flock of rescued animals whose names they don't know.
Ashley said that the belief that Kopulos' home was a rescue shelter led many people to hand their pets over to him when they could no longer care for their animals.
Now, she said, those same people are calling her to find out if their former pets are dead.
On his Facebook page, Kopulos has railed against animal mistreatment in recent months. In July, he posted an article about teenagers suspected of beating porcupines to death in New York.
"Since when is animal cruelty not animal cruelty?" he wrote. "'Nuisance' species or not, it's animal cruelty!"
"People are a nuisance," he added, "but you don't see me running around beating people to death."
© 2016 The Washington Post
(This story has not been edited by NDTV staff and is auto-generated from a syndicated feed.)