Sorry, haven't found a free one yet. These are a little expensive for me but here are some ducks and if you type deer in the search box you'll see her deer designs.

http://www.nancysnotions.com/product/wetland+ducks+embroidery+designs+with+free+pattern.do

Emb Library's are a little more in my range.

http://www.emblibrary.com/EL/search.aspx?search=deer

http://www.emblibrary.com/EL/search.aspx?search=duck

Maybe another Cutie can help. At least this will go ttt for more possible help.

10 free deer here, 9 ducks but they are not realistic. Just type in what you are looking for.

There are 2 realistic ducks in Designs by Cuties, I think one of them is named Matilda. Hugs, Marji

Here's Henry & Matilda together and separately, then the last link is my realistic reindeer..hope this helps........Vicki

Madwoman of Locke Street has a realistic doe in a set with other animals to add to your collection. She's very generous with her work. Maybe she'd sell you the individual design?