Once they were outside 24/7 I began mixing scratch grains in with the crumbles and I still give it to them every morning. What I did this morning was tear up more green leaf lettuce then usual and left a share of it down at the river's edge. When I got home and had the chance to check the duck was nowhere to be seen and neither was the lettuce. I didn't really expect to see the duck once the sun burnt off the mist because even in the water the sun is wicked hot. My porch is shaded and is showing a temp of 92 degrees F.
I stopped at the feed store on the way home this afternoon to see if the owners were missing any ducks from their pond. The idea to post pictures/information is a great idea. The idea of catching it makes me laugh when I picture myself staggering around out in the water with my fishing net. If the water is down and running slow it might be possible but with it running high and fast like today my only chance of catching it would be if it's on land in the high grasses. From what I'm reading here if it's going to stick around I need to catch it for it's own health and safety. Let's hope it knows how much it loves peas!!! I don't want to find it dead or sick or hurt. And from what I'm learning about ducks I really don't like seeing it alone.
I'll keep posting updates and I'm grateful for all the advice and suggestions. Looking at the sky right now I'm hoping it knows how to go to ground because it's fixin' to storm big time.