Common toads migrate annually to breeding ponds, crossing roads in large numbers and suffering enormous mortality without volunteer toad patrol interventions.
Road mortality during toad migration represents both individual welfare harm (traumatic death) and population-level conservation harm. Volunteer toad patrols provide direct welfare benefits by preventing deaths at specific crossing points. Infrastructure solutions including road tunnels and guiding barriers provide permanent welfare protection without requiring annual volunteer mobilisation. Habitat management maintaining suitable migration routes between terrestrial and aquatic habitats reduces crossing distance.