Gadwall  ( Canard chipeau )

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General Notes

The North American population of this species has increased by 500% 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.

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Observations

Banding Results