Cackling geese often go undetected when mingling with hundreds of Canada geese. They are a separate species and much smaller than Canadas.
Courtesy of Nathan Goldberg
This rare barnacle goose visited Will County in late 2012, but picking it out from the many Canada geese required a careful eye.
Courtesy of Mark Bowman
About this Article
When our Jeff Reiter started counting a flock of mallards, he discovered an impostor - a black duck - among the fowl. Experienced birders know to expect the unexpected, and Reiter says that's a smart approach if you want to see new birds. "There might be an uncommon species, or even a mega-rarity in our midst, but it takes a careful and patient observer to detect it."Latest Galleries
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