Northern Harrier

Northern Harrier Circus hudsonius

Abundance map: Post-breeding migration

Northern Harrier, Abundance map: Post-breeding migration
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Data provided by eBird

Northern Harrier

Circus hudsonius

Abundance: Post-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 post-breeding migration season.  Learn more

Relative abundance
Post-breeding migratory season
0
0.28
11.14
Season date range
Jul 27 - Dec 14 Learn more