Red-breasted Merganser

Red-breasted Merganser Mergus serrator

Abundance map

Red-breasted Merganser, Abundance map
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Data provided by eBird

Red-breasted Merganser

Mergus serrator

Abundance

This map depicts the seasonally-averaged estimated relative abundance, defined as the expected count on an eBird Traveling Count starting at the optimal time of day with the optimal search duration and distance that maximizes detection of that species in a region.  Learn more

Relative abundance
Year-round
0
1.26
1,194.84
Breeding season
Jun 7 - Jul 20
0
1.26
1,194.84
Non-breeding season
Dec 21 - Jan 25
0
1.26
1,194.84
Pre-breeding migratory season
Feb 1 - May 31
0
1.26
1,194.84
Post-breeding migratory season
Jul 27 - Dec 14
0
1.26
1,194.84
Note: Seasonal ranges overlap and are stacked in the order above; view full range in season maps.
Seasons timeline
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