Red-breasted Merganser

Red-breasted Merganser Mergus serrator

Range map: Pre-breeding migration

Red-breasted Merganser, Range map: Pre-breeding migration
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Data provided by eBird

Red-breasted Merganser

Mergus serrator

Range: Pre-breeding migration

This map depicts the range boundary, defined as the areas where the species is estimated to occur at a rate of 5% or more for at least one week within the pre-breeding migration season.  Learn more

Pre-breeding migratory season
Season date range
Feb 1 - May 31 Learn more