July 31 is World Ranger Day, which celebrates the work rangers do for the natural world and commemorates those killed or injured in the line of duty. Among them was Anton Mzimba, head ranger at Timbavati Private Nature Reserve in South Africa, where he had served for 25 years. On July 26, 2022, Mzimba was shot dead outside his home by two men, allegedly in connection with his rhino protection work. Four years later, the case remains open, with no arrests made. “If a ranger of Anton’s standing and integrity can be killed for doing work that serves the greater good, and there are still no consequences for the people who perpetrated this crime, what confidence does that inspire in the men and women holding the line on the front lines of conservation?” John Jurko II, lead director of a documentary about Mzimba titled Rhino Man, told Mongabay by email. In 2024, Jurko II launched a “Justice for Anton Mzimba” campaign to help speed up the investigation. Mzimba’s killing is being investigated by the Hawks, a specialized unit within the South African Police Service. Hawks typically investigate organized crime and police murders, but took over Mzimba’s case because of its links to rhino poaching and an ongoing investigation, according to Nico J. Gerber, the police general who heads the Hawks in Mpumalanga province, where Mzimba was killed. Gerber told Mongabay by email the case “has progressed well” and the case file was submitted to the Director of Public Prosecutions, which decides whether…This article was originally published on Mongabay

Long-tailed macaques, monkeys native to Southeast Asia, have been listed as endangered on the IUCN Red List since 2022 after their populations declined by at least 50% over 30 years. Yet, the U.S. Fish and Wildlife Service (FWS) has twice now declined to consider protecting the species under the domestic Endangered Species Act. The most recent decision was announced on July 14, 2026. Such a listing would have restricted the primate’s import for biomedical research, one of the biggest threats to its population. Mongabay asked FWS for comment but did not receive a response by publication. Long-tailed macaques (Macaca fascicularis) can live in a wide variety of habitats, from riverbanks and mangroves to rainforests and, even, cities. Despite their adaptability, populations of the medium-sized primates have declined sharply due to habitat loss, climate change, hunting and trade, primarily for biomedical research, according to the IUCN, the global wildlife conservation authority. A 2025 study found that macaques poached from the wild are likely supplementing the breeding farms in Cambodia, Laos and Vietnam that supply laboratories abroad. Lisa Jones-Engel, chief scientific advisor for primate experimentation with People for the Ethical Treatment of Animals (PETA), said trapping macaques for medical testing is the biggest factor in their population decline. “Because habitat change, climate change — these animals are so fabulously adaptable, they could roll with that,” Jones-Engel told Mongabay in a video call. She said entire troops of long-tailed macaques are captured from the wild, including infants and breeding females, and sold to breeding…This article was originally published on Mongabay

Kenya Wildlife Service (KWS) is investigating the deaths of 15 elephants in the Amboseli savannah ecosystem, near the border with Tanzania. KWS told Mongabay that some preliminary laboratory investigations have found a toxic substance in the dead elephants. The animals were found between June 24 and July 24, 2026, at the Kimana Sanctuary and Kuku Ranch, an area at the crossroads between three national parks in southern Kenya. “Ten elephants exhibited similar clinical signs, including partial paralysis that left them unable to stand before dying within one to two days,” KWS communications Director Duncan Wanyama said in a statement provided to Mongabay.  “The remaining five carcasses were too decomposed or had been scavenged, making it impossible to establish the cause of death. The condition primarily affected adult females and their calves, with only one adult male reported.” The University of Nairobi detected a toxic substance in the elephant samples they tested. However, test results from Government Chemist, a Kenyan national lab, were negative for toxic substances. “Further quantitative analysis is underway,” KWS stated. Some elephants were equipped with tracking devices, and authorities were alerted to the deaths when the tracked animals stopped moving, Wanyama told Mongabay in a phone call.  He said investigations, including analysis of water sources and other resources, were underway to determine if the elephants were exposed to a common source. “The condition observed is confined to the affected elephants, and there is no indication that it is transmissible to humans,” Wanyama said. Meanwhile, local leaders want…This article was originally published on Mongabay

A federal judge in Brazil has given the country’s government 24 months to recognize the traditional territory of the Kajkwakratxi-Tapayuna Indigenous people in the northwestern state of Mato Grosso. The court accepted evidence from federal prosecutors that detailed decades of government inaction following massacres, forced displacement and other human rights violations against the Kajkwakratxi-Tapayuna people. The ruling, issued on June 11 by Federal Judge Pablo Kipper Aguilar in Diamantino, Mato Grosso, also orders the federal government to issue a public apology and pay 10 million reais ($2 million) in collective moral damages. “It has been a very difficult journey,” Yaiku Suya Tapayuna, a leader of the Kajkwakratxi-Tapayuna people, told Operação Amazônia Nativa (OPAN). “It is a decision we have dreamed about, and we are now celebrating this victory.” In his decision, the judge drew upon decades of evidence of violence against the Kajkwakratxi-Tapayuna, beginning with a massacre in 1953 involving armed attacks and deliberate poisoning. A dictatorship-era report published in 1967 documented that a nearby rubber tapping business left a sack of sugar laced with arsenic on a riverbank in the Tapayuna area for the Indigenous community to consume. Another poisoning attack occurred in the 1960s with meat laced with tick poison. In 1969, a “poorly planned” official visit organized by the federal Indigenous affairs agency brought in the influenza virus, contaminating the Kajkwakratxi-Tapayuna people. An account given to national media at the time described, “Indigenous corpses decimated by the flu across the forest, and children nursing from the breasts…This article was originally published on Mongabay