In 2007 was built the fauna path of Bonne famille.

Each year, during the reproduction season (spring) near Isle Crémieu, thousands of amphibians cross the road 124 to go to the pond located on the other side of the road. Those amphibians are protected by the french and european laws. In 2001 the LPO has counted more than 3463 common toads, 14 red frogs, 10 agile frogs, 4 green frogs and 1 palmate newt.

AThe presence of those amphibians on the road is obviously dangerous for the frogs themselves but also for the drivers, as the road is slippery and a lot of other predators is coming.

4 underpaths will be created under the road along 400 meters.