There are these things called duck decoys, which are like fake ducks that hunters use to trick real ducks into coming closer so they can catch them. A hale duck decoy means that it's made out of a special kind of material called hale, which is a type of wood that's strong and durable.
So think of it like you have a toy duck that looks like a real duck, but instead of being made out of plastic or rubber like a regular toy, it's made out of a really tough kind of wood. This means it can last a long time and be used over and over again by hunters who want to catch ducks.
Hale duck decoys are especially popular because they can withstand harsh weather conditions like rain or wind and are less likely to get damaged compared to decoys made from other materials. So hunters can rely on them to attract ducks year after year.