In the late 1800's there were thousands of ducks and geese on the East Coast flyway and the market hunters made a killing there. In about 1913 or so there was a major hurricane that came through and wiped out the native celery grasses and therefore the food source. Coupled with over hunting the duck and geese populations have been almost eliminated.
There is a really nice museum that has great displays of decoys, and early hunting equipment and celebrates many of the old time local carvers.
There are other places we have visited, in Maryland, where decoy carving and now collecting is a big deal, Salisbury, Easton and Chinoteague
We have not been to Harve de Grace for several years so as it turned out this trip to the East Coast worked out that we could at least get to the decoy show for a couple of hours on Friday night before we needed to head back to Indiana.
There were and are several overall categories or decoys. There were the 1890's hand made and now very expensive decoys. The 1920'-19050's hand made utilitarian decoys made by carpenters, boat builders, hunters, bakers etc. were usually done in a small shop or basement. Factory decoys were pumped out by the thousands in the post war years made on duplicating machines like the one below. Today there is an emphasis on fancy realistic carving where it is difficult to tell the difference between a wooden duck and there real thing. The Harve de Grave areas tends to focus on the hand carved in a small shop type of decoys.

