Evaluating factors affecting amphibian mortality on roads: the case of the Common Toad,
Bufo bufo, near a breeding place.—The Common Toad Bufo bufo is the amphibian with the
highest rates of road mortality in many European countries. This elevated incidence of road
kills has frequently been associated with migration to breeding sites. In this study, we
analysed the mortality of the Common Toad in the road network in Catalonia (NE Spain),
and investigated the related causative factors on four roads near a breeding site in the …

The Common Toad Bufo bufo is the amphibian with the highest rates of road mortality in
many European countries. This elevated incidence of road kills has frequently been
associated with migration to breeding sites. In this study, we analysed the mortality of the
Common Toad in the road network in Catalonia (NE Spain), and investigated the related
causative factors on four roads near a breeding site in the Pyrenees. Results suggest that
the high mortality rate is due to a combination of factors: toad abundance, traffic density and …