On November 29th, we celebrate International Jaguar Day, a date created to highlight the importance of protecting one of the most iconic animals of Brazil. This day is a moment to raise awareness about the essential role this big cat plays in nature and about ongoing conservation efforts.
The jaguar (Panthera onca) is the largest feline in the Americas and the third largest in the world behind only the tiger and the lion. A symbol of strength, beauty, and ecological balance, it is considered a guardian of Brazil’s biodiversity. Growing up to 2.5 meters in length and more than 100 kg in weight, the jaguar is a top predator, crucial for maintaining the health and balance of the ecosystems where it lives.
Originally distributed from the southern United States to northern Argentina, the species has lost more than 50% of its natural range. Today, Brazil is home to the largest jaguar population on the planet, mostly in the Amazon and the Pantanal, which still preserve large intact areas. In other biomes, the situation is more concerning: in the Cerrado, the species is classified as “endangered,” in the Atlantic Forest and Caatinga it is “critically endangered,” and in the Pampas the jaguar is already considered extinct, according to the IUCN (International Union for Conservation of Nature). Habitat loss, forest fragmentation, and illegal hunting are among the main threats to the species’ survival with pressures varying across regions.
Caption: Global conservation status table of the species (IUCN – International Union for Conservation of Nature).
An encouraging success story is that of Jatobazinho, a male reintroduced in Iberá Park, Argentina through a partnership between Onçafari and Rewilding Argentina after seven decades of the species’ absence in the neighboring country. Jatobazinho adapted quickly to its new territory and over three years has fathered more than 13 offspring, helping to rebuild the jaguar population in the region.
Caption: Jaguar Amburana and Tata by Lucas Morgado, and Jatobazinho by Victoria Pinheiro.
Even in the face of changes caused by human activity, the jaguar shows a remarkable ability to adapt. Its populations vary according to habitat and prey availability, reflecting behavioral and physical differences across environments.
Jaguars possess the strongest bite proportional to body mass among big cats which is powerful enough to pierce skulls and shells. The species is also the only big cat in the Americas capable of producing a “roar”, a deep and potent sound used for communication and territorial marking that reinforces invisible boundaries to avoid unwanted encounters with other jaguars.
📸: Carolina Prange
They also mark territory through trees. When they scratch trunks, they leave visual marks as well as chemical ones: glands between their toes release pheromones that remain on the bark, signaling to other individuals that the area is occupied. Trees, however, serve more purposes than territorial marking in a jaguar’s daily routine.
Jaguars climb trees to rest safely, monitor their surroundings, avoid flooded areas, find alternative routes, hide smaller prey, or gain an advantage during hunts. This ability reinforces the species’ versatility, as jaguars can move skillfully both on the ground and in the canopy.
Just as they dominate the treetops, jaguars also show impressive skill in the water, using rivers and lagoons as natural highways. In the Pantanal, they can swim long distances, chase prey in the water, and even dive to capture animals such as caimans.
📸: Lucas Morgado
Visually, each jaguar has its own “signature”: rosettes—unique spots, like fingerprints—that reveal individual identity and provide camouflage in different environments. Among the species’ variations, the black jaguar stands out, the result of a genetic mutation called melanism which increases melanin production and darkens the fur without hiding the rosettes.
Jaguar reproduction is marked by strategic behavior for species continuation in which females may mate with more than one male during the fertile period to increase their chances of conception. After a gestation period of about 90 to 110 days, cubs are born blind and completely dependent on their mother, who chooses isolated and protected areas for giving birth, ensuring safety during the first months of life.
Young jaguars stay with their mother for approximately one and a half to two years, a crucial learning period. She teaches them hunting techniques, how to move across different environments—such as swimming in flooded areas or climbing trees to rest and watch—along with other behaviors essential for survival.
Caption: Jaguar Aracy and her cub Mocoha by Lucas Morgado, black jaguar Simplício by Edu Fragoso, and jaguar Timburé by Lucas Morgado.
Onçafari’s ability to observe jaguars so closely is due to the practice of habituation, a process that allows jaguars to gradually grow accustomed to the presence of vehicles without altering their natural behavior. This technique makes ecotourism in the Pantanal possible. Esperança, considered Onçafari’s “great mother,” was one of the first jaguars to be habituated and many of her descendants have continued to provide unforgettable encounters for the team and visitors. Since 2011, Onçafari has identified more than 270 jaguars in the Caiman Pantanal region using technologies such as GPS collars, camera traps, and telemetry to better understand the animals’ behavior, interactions, and movements.
During this Jaguar Day, Onçafari celebrates the presence of this feline symbol of Brazilian biodiversity. Jaguar conservation is, above all, an invitation to coexistence because protecting this predator means protecting the entire ecosystem it inhabits. May the jaguar’s roar continue to echo through the forests, savannas, and plains of the Americas for generations to come, reminding us that where there are jaguars, there is life in balance.
Learn more stories about our monitored jaguars in the Pantanal: Aracy, Aroeira, Formoso, and Dakari.
Written by: Maria Julia Farias
Cover photo: Lucas Morgado
