By DAVID McFADDENKINGSTON, Jamaica (AP) â¿¿ The lushly forested nation of Guyana on Thursday joined a regional pact to protect jaguars, the elusive spotted cat that is the biggest land predator in the Americas but is vulnerable due to expanded agriculture and mining that carves away at their fragmented habitat. Leaders of the government's environment ministry were signing an agreement with the New York-based conservation group Panthera, which is trying to establish a "jaguar corridor," a network of pathways that would link core jaguar populations from northern Argentina to Mexico. Guyana is pledging to ensure the protection of jaguars, the national animal that is a near-threatened species. The South American nation with some of the region's least spoiled wilderness joins Colombia and nations in Central America in recognizing the corridor and agreeing to work towards the long-term conservation of jaguars, according to Esteban Payan, regional director for Panthera's northern South America jaguar program. A network of cameras equipped with motion sensors and fixed to tree trunks has revealed tantalizing glimpses of sleek, solitary jaguars slinking through Guyana's dense rain forests and vast grasslands stretching to the country's border with Brazil. Scientists reported finding a relatively healthy jaguar density of three to four animals per 100 kilometers (161 miles) in Guyana's southern Rupununi Savannah. That means that preserving grasslands are as important to conservation of jaguars as protecting the dense rain forests, they say. Evi Paemelaere, a Belgian jaguar scientist with Panthera, said Amerindian villagers in remote spots in Guyana have helped her set up cameras along the roads and hunting trails that the big cats like to travel on. "Amerindians are very keen on being part of the project," she said from the capital of Georgetown. Jaguars once roamed widely from the southwestern United States to Argentina, but have lost nearly half of their natural territory and have disappeared altogether from some countries. Heavy hunting for their spotted coats decimated their numbers in the 1960s and early 1970s until the pelt trade was largely halted. No one has any reliable estimates of how many jaguars are left in the wild, where they prey on peccaries, tapirs and, since they are powerful swimmers, river turtles.