Great Blue Heron  ( Grand Héron )

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Ardea herodias

Description:    Great Blue Heron
Photo Date:   August 27, 2007


Hilliardton Marsh


Michael Werner

General Notes

The North American population of this species has increased by over 130% in the forty years spanning 1966 to 2006, according to a recent analysis of Christmas Bird Count and Breeding Bird Survey records conducted by National Audubon Society scientists. Though there is always some inherent variability in the source data, there is a sufficient quality and quantity of data for this species to be able to quantify the change in population with a high level of statistical confidence.

Abundance: Common Earliest observed date:  

Typical arrival date:

April 5
Breeding Status: Breeding Latest observed date:  

Typical departure date:

November 10