ARIZONA REPUBLIC (Phoenix) 28 July 06 Homeless tortoises are up for adoption (Kate Nolan)
Arizona's desert tortoises have been around for 12,000 years or so. But like much of Arizona's wildlife, some are looking for homes as fires and urban growth compromise their living quarters, typically on bajadas, the sloping plains at the base of mountains.
State biologists are visiting Cave Creek and Estrella Mountain regional parks Saturday to sign up adoptive households for homeless tortoises.
It's a rare opportunity. It's illegal to own a tortoise under most circumstances. Adoption requires a considerable commitment. The animals can live to age 80, grow to 15 inches in length and have specific space and shelter needs, including a burrow and an enclosed pen with a plot of grass. advertisement
"Once captured, a tortoise can't go back to nature," said Arizona Game and Fish biologist Lisa Bucci, who works with tortoises. Given the long-term obligation, potential adopters are screened and educated on building the habitat and caring for the tortoise. The orphaned tortoises have either lost their natural or adopted habitats.
According to Thomas Jones, who heads the state's amphibians and reptiles program, Arizona's tortoises, known as Sonoran desert tortoises, are surviving but are pressured by habitat destruction, wildfires and disease. The Mojave desert tortoise in Nevada and California is the same species, but has been placed on the endangered species list as "threatened," primarily because of devastating outbreaks of an upper-respiratory disease.
"Domesticated tortoises can get it; sometimes they get released and spread it," Jones said.
He wants prospective adopters to know that domesticated tortoises should never be released. In addition to exposing wild tortoises to infection, they don't do well in the wild, with natural predators that include mountain lions.
Game and Fish has monitored tortoises at specific study sites for 10 years, but much of the data are still being analyzed.
"They live a tenuous existence," Jones said. It's clear that development is having an impact on their population, but Jones suspects another factor may be just as influential.
"Catastrophic wildfire is sweeping through much upland Sonoran habitat, but in my opinion, we know too little of its effect on tortoises and other reptiles," Jones said. A prime study area on the west side of Sugarloaf Mountain near the Beeline Highway was spared by a 1993 fire on the eastern side of the mountain.
Jones said data are lacking to measure the impact of recent fires, such as the 1995 Rio Fire that burned 23,365 acres. "I suspect a fire of that nature affected tortoises. I would like to gather the data," he said.
Homeless tortoises are up for adoption

