I have two left. 20d: Duck with you on land, might you say? I have: ?A?D?R. And 16d: Couple of idiots identifying the house sparrow? I have: ?W?T-?W?T. (Can TWIT-TWIT be a proper word?) Help appreciated!
20d.Gander
16d.Twit ***
www.merriam-webster.com/dictionary/twit-*** Definition of twit-*** from the Merriam-Webster Online Dictionary with audio pronunciations, ... house sparrow ..