Safety fence

Migrating frogs, often squashed by passing vehicles when crossing roads, get a helping hand.

A WHITE bucket in hand, Christine Zorn walks along the knee-high tarpaulin fencing a road in north Berlin. The air is thick with the sound of noisy seagulls from a pond across the road. Every few metres, Zorn stops and looks behind the fence into a pail whose open mouth is level with the ground. In each pail is a stick, which she uses to carefully stir the dead leaves inside.