It is vastly found among the wild and domestic duck population due to being passed on in utero.
In 1987, the normal duck population was 120, at times reaching more than 200, including migratory visitors.
But now the decoy helps to preserve the duck population.
The subsidies also have ensured the revival of a duck population that was in serious decline.
Declines in black duck populations have been observed since the 1960's.
During the crisis years of 1988-1991 and 2001-2002, the duck population was devastated, allegedly by people desperately looking for food.
North American duck populations are now nearly 25 percent below the long-term average.
What is certain is that there was a duck population of some size in the mid-1870s, while in 1900 all were gone.
It also houses 25% of the state's black duck (Anas rubripes) population.
They said the duck population this year was the second smallest on record.