There is a huge park in New Manchester, the Tomlinson Run, where Canadian geese are plenty. We visited there a couple of weeks ago (I still have to upload those photos). We found a lone duck, not sure if it's a mallard duck but he seem to like our kids because he kept following us wherever we went. Our burritos got tickled by that so they asked us to go back again. We went there last weekend and we brought Dad with us.
We brought some bread and the kids fed him which he enjoyed so much.Hey, the feet of the duck are orange so it's perfect for OT.
Tomlinson Run is pretty big, there are different recreation being offered which includes a huge lake where you can catch fish, water recreation area ( we haven't tried it yet), a mini golf course, play area for the kids, and camping and picnic grounds.
The place is like thirty minutes drive from our place but it's worth the drive because there is so much to see and explore down there.