I am new to ducks and have had limited exposure to them. A person down the road from me has a flock of (what appear to be) Rouens, Swedish, and Cayugas. These things are HUGE! All I knew when I ordered ducks was that if I wanted something the size of a goose, I'd get a goose. LOL So, with that in mind, I ordered a trio of Mallards. Now they are getting ready to move outside and I have duckling fever. I really want a pair of Welsh Harlequins. However I am wondering what size the adults are? I can't find much online but a weight... and I am having trouble picturing the size of a duck by weight. I couldn't tell you what my Mallards weigh. Are WHs closer to a Mallard in size, or those ginormous Rouens?