Rabinowitz hopes to convince national governments throughout the jaguar's range to maintain this web of habitat through enlightened land-use planning, such as choosing noncritical areas for major developments and road construction. "We're not going to ask them to throw people off their land or to make new national parks," he said. The habitat matrix could encompass woodlands used for a variety of human activities from timber harvest to citrus plantations. Studies have shown that areas smaller than one and a half square miles can serve as temporary, one- or two-day homes—stepping-stones—for wandering jaguars.

While the habitat making up the proposed network is mostly intact for now, prompt conservation action will be needed to protect it, especially in certain areas of Central America and Colombia, where some jaguar travel paths already are critically tenuous. By studying satellite photographs and airplane surveys, and walking sections of the proposed corridor to follow up on reports from local people, Rabinowitz and his team can identify the segments most in need of protection. He then can go to government decision-makers with hard scientific data, he said. "Our first challenge is looking at corridors where there's just a single tendril. We've got to lock up these areas."

Diana Hadley of the Arizona-based Northern Jaguar Project works to protect the northernmost jaguar population in Mexico, with the long-term goal of seeing the species return to the United States. Hadley said the project and its Mexican partners "fully support" Paseo del Jaguar. "If these magnificent animals are ever to reoccupy appropriate habitat north of the border," she said, "the stepping-stones in the jaguar corridor are essential." Paseo del Jaguar ranks with the world's most ambitious conservation programs, and realizing it will take many years. Rabinowitz is focusing first on Mexico and Central America, where officials in all eight countries have approved the project. Costa Rica has already incorporated protection of the corridor into laws regulating development.

Later he'll tackle South America, where landscapes and political situations are more diverse and challenging. Rabinowitz is encouraged, though, by his audiences' emotional response when he talks about jaguars—a response based on the animal's enduring aura of beauty, strength, and mystery. Indigenous peoples around Mexico's central plateau, and the Maya, farther south, incorporated the jaguar into their art and mythology. Today even mobile-phone-carrying government ministers sitting in urban offices feel what Rabinowitz calls "a powerful cultural thread binding them to their ancestors. Nobody can say that the jaguar is not part of their own heritage," he said. "What better unifying symbol can there be than the jaguar?"