County supervisors may take the unprecedented step of banning the local importation, sale or posession of bullfrogs, part of effort to save other amphibians. Bullfrogs are native to the eastern U.S. but have infested local waters such as Antonelli Pond and Loch Lomond, preying on smaller species such as the endangered California Red-Legged Frog. They can also spread disease to native species, and are difficult to eradicate. Based on a recommendation from the county's Fish and Game Advisory Commission, the board voted on Tuesday to consider enacting a ban in February, but also to urge the state to finally enact...