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Interesting gulls in Charles Co., Maryland. Last updated: 1/31/2011.

A first-cycle Nelson's Gull (Herring x Glaucous) hybrid at the Charles Co. Landfill, Maryland (1/29/2011). Photo by Bill Hubick.

Above and below: A first-cycle Nelson's Gull (Herring x Glaucous) hybrid at the Charles Co. Landfill, Maryland (1/29/2011).

A first-cycle Nelson's Gull (Herring x Glaucous) hybrid at the Charles Co. Landfill, Maryland (1/29/2011). Photo by Bill Hubick.

A first-cycle Nelson's Gull (Herring x Glaucous) hybrid at the Charles Co. Landfill, Maryland (1/29/2011). Photo by Bill Hubick.

A first-cycle Nelson's Gull (Herring x Glaucous) hybrid at the Charles Co. Landfill, Maryland (1/29/2011). Photo by Bill Hubick.

A first-cycle Nelson's Gull (Herring x Glaucous) hybrid at the Charles Co. Landfill, Maryland (1/29/2011). Photo by Bill Hubick.

Below: A presumed adult Lesser Black-backed x Herring hybrid at the Charles Co. Landfill, Maryland (1/29/2011).

A presumed adult Lesser Black-backed x Herring hybrid at the Charles Co. Landfill, Maryland (1/29/2011). Photo by Bill Hubick.

A presumed adult Lesser Black-backed x Herring hybrid at the Charles Co. Landfill, Maryland (1/29/2011). Photo by Bill Hubick.

A presumed adult Lesser Black-backed x Herring hybrid at the Charles Co. Landfill, Maryland (1/29/2011). Photo by Bill Hubick.

Below: An interesting first-cycle gull at the Charles Co. Landfill, Maryland (1/29/2011). It is most likely just an unusual Herring Gull, but some features had us originally considering Lesser Black-backed x Herring hybrid.

An interesting first-cycle gull at the Charles Co. Landfill, Maryland (1/29/2011). It is most likely just an unusual Herring Gull, but some features had us originally considering Lesser Black-backed x Herring hybrid. Photo by Bill Hubick.

An interesting first-cycle gull at the Charles Co. Landfill, Maryland (1/29/2011). It is most likely just an unusual Herring Gull, but some features had us originally considering Lesser Black-backed x Herring hybrid. Photo by Bill Hubick.

An interesting first-cycle gull at the Charles Co. Landfill, Maryland (1/29/2011). It is most likely just an unusual Herring Gull, but some features had us originally considering Lesser Black-backed x Herring hybrid. Photo by Bill Hubick.

An interesting first-cycle gull at the Charles Co. Landfill, Maryland (1/29/2011). It is most likely just an unusual Herring Gull, but some features had us originally considering Lesser Black-backed x Herring hybrid. Photo by Bill Hubick.

An interesting first-cycle gull at the Charles Co. Landfill, Maryland (1/29/2011). It is most likely just an unusual Herring Gull, but some features had us originally considering Lesser Black-backed x Herring hybrid. Photo by Bill Hubick.

An interesting first-cycle gull at the Charles Co. Landfill, Maryland (1/29/2011). It is most likely just an unusual Herring Gull, but some features had us originally considering Lesser Black-backed x Herring hybrid. Photo by Bill Hubick.

An interesting first-cycle gull at the Charles Co. Landfill, Maryland (1/29/2011). It is most likely just an unusual Herring Gull, but some features had us originally considering Lesser Black-backed x Herring hybrid. Photo by Bill Hubick.

Below: For fun, I'll point out that this bird recalls Glaucous Gull for me. How often are these impressions due to hybridization/backcrosses in a bird's past? I can't help but think that such distant backcrosses should be fairly common.

For fun, I'll point out that this bird recalls Glaucous Gull for me. How often are these impressions due to hybridization/backcrosses in a bird's past? I can't help but think that such distant backcrosses should be fairly common. Photo by Bill Hubick.

For fun, I'll point out that this bird recalls Glaucous Gull for me. How often are these impressions due to hybridization/backcrosses in a bird's past? I can't help but think that such distant backcrosses should be fairly common. Photo by Bill Hubick.

Below: An adult Red-shouldered Hawk in Howard Co., Maryland (1/23/2011).

An adult Red-shouldered Hawk in Howard Co., Maryland (1/23/2011). Photo by Bill Hubick.

Below: An American Pipit feeds at the roadside on a snowy day in Prince George's Co., Maryland (1/29/2011).

An American Pipit feeds at the roadside on a snowy day in Prince George's Co., Maryland (1/29/2011). Photo by Bill Hubick.

An American Pipit feeds at the roadside on a snowy day in Prince George's Co., Maryland (1/29/2011). Photo by Bill Hubick.

Below: An American Kestrel near Blue Mash Nature Trail, Montgomery Co., Maryland (1/30/2011).

An American Kestrel near Blue Mash Nature Trail, Montgomery Co., Maryland (1/30/2011). Photo by Bill Hubick.

Below: A Northern Harrier in Montgomery Co., Maryland (1/30/2011).

A Northern Harrier in Montgomery Co., Maryland (1/30/2011). Photo by Bill Hubick.

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