Here is some interesting reading more to the point for those having trouble connecting dots....

Scheuhammer, A.M., Rogers, C.A., Bond, D., 1999. Elevated lead
exposure in American woodcock (Scolopax minor) in eastern
Canada. Arch. Environ. Contam. Toxicol. 36, 334–340.
Sharley, A.J., Best, L.W., Lane, J., Whitehead, P., 1992. An overview of lead poisoning in Australian waterfowl and implications for
management. In: Pain, D.J., (Ed.), Lead Poisoning in Waterfowl.
IWRB Spec. Pub. 16, Slimbridge, pp. 73–77.
Snyder, N.F., Snyder, H.A., Lincer, J.L., Reynolds, R.T., 1973.
Organochlorines, heavy metals, and the biology of North
American accipiters. Bioscience 23, 300–305.
Stendell, R.C., Artmann, J.W., Martin, E., 1980. Lead residues in
Sora rails from Maryland. J. Wildlife Manage. 44, 525–527.
Stone, W.B., Butkas, S.A., 1978. Lead poisoning in wild turkey
(Meleagris gallopavo). New York Fish Game J. 25, 169.
Szymczak, M.R., 1978. Steel shot use on a goose hunting area in
Canada. Wildlife Soc. Bull. 6, 217–225.
Scheuhammer, A.M., Bond, D.E., Burgess, N.M., Rodrigue, J., 2003.
Lead and stable isotope ratios in soil, earthworms and bones
of American woodcock (Scolopax minor) from eastern Canada.
Environ. Toxicol. Chem. 22, 2585–2591.
Scheuhammer, A.M., Norris, S.L., 1995. A review of the environmentalimpacts of lead shotshell ammunition and lead fishing
weights in Canada. Can. Wildlife Serv. Occasional Paper 88.
Scheuhammer, A.M., Norris, S.L., 1996. The ecotoxicology of lead
shot and lead fishing weights. Ecotoxicology 5, 279–295.