Common Merganser

Common Merganser Mergus merganser

Abundance map: Pre-breeding migration

Common Merganser, Abundance map: Pre-breeding migration
The Cornell Lab logo
Data provided by eBird

Common Merganser

Mergus merganser

Abundance: Pre-breeding migration

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, averaged across the pre-breeding migration season.  Learn more

Relative abundance
Pre-breeding migratory season
Season date range
Mar 1 - May 31 Learn more