The jaguar is a large cat species native to the Americas and the largest feline in the Americas. It can weigh up to 158 kg and reach 1.85m in length. Its coat is typically pale yellow to tan with spots that transition to rosettes, though melanistic individuals exist. The jaguar possesses a powerful bite, enabling it to pierce turtle shells. Uniquely, it often kills mammalian prey by biting directly through the skull, delivering a fatal blow to the brain.
In 1939, Reginald Innes Pocock recognized eight subspecies of jaguars based on the geographic origins and skull morphology of various specimens. He expressed doubt about the subspecific status of several due to limited access to zoological specimens.
In Venezuela, the jaguar was extirpated in about 26% of its range in the country since 1940, mostly in dry savannas and unproductive scrubland in the northeastern region of Anzoátegui.
In 1948, the last confirmed jaguar in Texas was shot 4.8 km (3 miles) southeast of Kingsville, Texas.
In Arizona, a female jaguar was shot in the White Mountains in 1963.
Arizona outlawed jaguar hunting in 1969, by which time the population was severely reduced.
The trade in jaguar skins decreased since 1973 when the Convention on International Trade in Endangered Species was enacted.
In 1977, groups consisting of a male, female and cubs, and two females with two males were sighted several times in a study area in the Paraguay River valley.
In 1986, the Cockscomb Basin Wildlife Sanctuary was established in Belize as the world's first protected area for jaguar conservation.
In the Alto Paraná Atlantic forests, at least 117 jaguars were killed in Iguaçu National Park and the adjacent Misiones Province between 1995 and 2008.
Between 1996 and 2024, eight jaguars were photographed in the southwestern US.
In 1996, a rancher and hunting guide from Douglas, Arizona, encountered a jaguar in the Peloncillo Mountains and became a researcher, using trail cameras to record four more jaguars.
Between 1998 and 2014, 220 of 230 jaguars were killed in Panama in retaliation for predation on livestock.
In 1999, field scientists from 18 jaguar range countries determined the most important areas for long-term jaguar conservation based on the status of jaguar population units, stability of prey base and quality of habitat. These areas, called "Jaguar Conservation Units" (JCUs), are large enough for at least 50 breeding individuals.
In 1999, the jaguar's historic range at the turn of the 20th century was estimated at 19,000,000 km, stretching from the southern United States through Central America to southern Argentina. By the turn of the 21st century, its global range had decreased to about 8,750,000 km.
Between 2000 and 2012, forest loss in the jaguar range amounted to 83.759 km.
Between October 2001 and April 2004, 10 jaguars were monitored in the southern Pantanal. In the dry season from April to September, they killed prey at intervals ranging from one to seven days; and ranging from one to 16 days in the wet season from October to March.
In 2001, a male jaguar killed and partially consumed two cubs in Emas National Park. DNA paternity testing of blood samples revealed that the male was the father of the cubs.
In 2002, it was estimated that the range of the jaguar had declined to about 46% of its range in the early 20th century.
In 2002, the jaguar is listed as Near Threatened on the IUCN Red List since, as the jaguar population has probably declined by 20–25% since the mid-1990s.
Studies employing GPS telemetry in 2003 and 2004 found densities of only six to seven jaguars per 100 km in the Pantanal region, compared with 10 to 11 using traditional methods.
Between October 2001 and April 2004, 10 jaguars were monitored in the southern Pantanal. In the dry season from April to September, they killed prey at intervals ranging from one to seven days; and ranging from one to 16 days in the wet season from October to March.
In 2004, a camera trap in the Sierra Madre Occidental mountains photographed the first documented black jaguar in Northern Mexico.
Studies employing GPS telemetry in 2003 and 2004 found densities of only six to seven jaguars per 100 km in the Pantanal region, compared with 10 to 11 using traditional methods.
In 2005, Mexico started developing a national conservation strategy for jaguars.
The first official record of a jaguar killing a human in Brazil dates to June 2008.
In the Alto Paraná Atlantic forests, at least 117 jaguars were killed in Iguaçu National Park and the adjacent Misiones Province between 1995 and 2008.
In 2010, optimal routes of travel between core jaguar population units were identified across its range to implement wildlife corridors that connect JCUs.
In 2010, the estimated jaguar population in Mexico was approximately 4,000 individuals.
Between 2000 and 2012, forest loss in the jaguar range amounted to 83.759 km.
Between 2008 and 2012, at least 15 jaguars were killed by livestock farmers in central Belize.
Between 2012 and 2015, a male vagrant jaguar was recorded in 23 locations in the Santa Rita Mountains.
Two more cases of infanticide were documented in the northern Pantanal in 2013.
Between 1998 and 2014, 220 of 230 jaguars were killed in Panama in retaliation for predation on livestock.
Between 2012 and 2015, a male vagrant jaguar was recorded in 23 locations in the Santa Rita Mountains.
Between August 2016 and August 2019, jaguar skins and body parts were seen for sale in tourist markets in the Peruvian cities of Lima, Iquitos and Pucallpa.
In 2016, Mexico's national conservation strategy, which had been developed since 2005, was officially published.
Since 2017, the jaguar has been considered a monotypic taxon, although the modern Panthera onca onca is still distinguished from two fossil subspecies.
By 2018, the Mexican jaguar population had grown to about 4,800 individuals, an increase attributed to successful conservation efforts.
In 2018, it was estimated that the jaguar range had declined by 55% in the last century.
The Jaguar Recovery Plan was published in April 2019, in which Interstate 10 is considered to form the northern boundary of the Jaguar Recovery Unit in Arizona and New Mexico.
Between August 2016 and August 2019, jaguar skins and body parts were seen for sale in tourist markets in the Peruvian cities of Lima, Iquitos and Pucallpa.
Between 1996 and 2024, eight jaguars were photographed in the southwestern US.
In 2024, a study suggested that the validity of subspecific assignments on both P. o. augusta and P. o. mesembrina remains unresolved, since both fossil and living jaguars show a considerable variation in morphometry.
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