Non-lead hunting ammunition has been mainstream, especially for waterfowl hunting, for over 20 years. Since the ban on lead ammunition for waterfowl hunting, many bird species have been conserved due to the decrease in lead on our landscapes like raptors, waterfowl, and scavenging birds; today, these critters are ambassadors for using non-lead ammunition when hunting.
But lead ammunition is still legal to use for upland bird hunting, including some spots in Wisconsin. As a result, lead continues to accumulate in places where upland hunters pursue birds. The American woodcock has flown under the radar in this regard. However, one team of researchers in Wisconsin noticed that woodcock accumulate high levels of lead in their bodies.