This solitary merganser seems to be teaming up to fish with a heron. They trolled back and forth together as I watched from a distance (with my crappy super zoom point + shoot while trying to keep the row boat steady with one hand, hence the poor photo quality) . Every so often the merganser would do his splashy acceleration. I haven’t been able to find any documented instances of this but I did see if once before with a small group of mergansers.
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