For shotgun shells. Geese, ducks and swans would swallow shotgun pellets when they ate from the water.
I think I saw that on a Looney Tunes show once.
YEAH? Good luck with that bullshit to.
I’ve been a dredge/placer miner for the last 40 years (until the environazis outlawed dredge mining); one thing I can tell you for sure, any lead shot dropped into a river, stream, creek, pond, or lake is going to sink into the mud/sand so fast that the ducks, geese, and swans will need at least a 5 horsepower 2 inch dredge to get at it.
Last time I checked waterfowl didn’t pack dredges on their migration flights!