Figure 3

Survival of young blackbirds in relation to exposure Pb. Survival for the first, second and third year following feather sampling versus Pb concentration in the tail feathers of young blackbirds in their second year of life, n = 46.

Survival of young blackbirds in relation to exposure Pb. Survival for the first, second and third year following feather sampling versus Pb concentration in the tail feathers of young blackbirds in their second year of life, n = 46.