Great Blue Heron

Great Blue Heron Ardea herodias

Abundance map: Pre-breeding migration

Great Blue Heron, Abundance map: Pre-breeding migration
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Data provided by eBird

Great Blue Heron

Ardea herodias

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
0
0.6
27.43
Season date range
Feb 1 - May 3 Learn more