The key to hunting teal near a large river is getting off the main flow altogether and setting up on backwater micro zones that offer seclusion and still water.
Oxbows To find a good oxbow lake or slough, simply study a stretch of river using the satellite photo feature on Google Maps. Boat, kayak, or canoe to a spot where you can land the boat, then hike in and pothole-it.
Spillovers A summer or autumn with ample rain produces overflow ponds, pools, sloughs, and bays. Teal flock to these shallow, food-filled flood zones.