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Thursday, November 15, 2018

Oklahoma Winter Bird Profile: Red-breasted Merganser



These thin, long-bodied ducks with the thin red bill and shaggy crest are definitely something to be seen.  They are found in small groups and will be observed in salt water in both sheltered coasts and bays.  They are less common inland, but will certainly make exceptions.

These birds are very similar to the Common Merganser who nests in cavities and favors fresh water.  These fish eaters are known as sawbills, as they are so equipped.  The most widespread of all the mergansers, this sexually dimorphic duck is a strong flyer, easily capable of reaching speeds of eighty miles per hour.  Unless it is breeding, it will be usually found at sea both inshore and well offshore.

This late breeder may not have fledged young until September, and it first breeds at the age of two, a notoriously late breeder.  Females incubate as the males tend to leave for points unknown in order to molt.  The species breeds further north and winters further south than the other species of mergansers.


                                                             Red-breasted Mergansers
                                                              Boomer Lake Park, 2017

Generally silent, during breeding times they have usually been found grunting and croaking.

Like the Common Merganser, these diving ducks will herd fish and drive them inland to have an easier time foraging.  They also hunt collectively.


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