Bill Hubick Photography - Northern Rough-winged Swallow (Stelgidopteryx serripennis)

A Northern Rough-winged Swallow near its nesting cavity on a bank of the Patapsco River, Howard Co., Maryland (5/20/2007). Photo by Bill Hubick.

Above: A Northern Rough-winged Swallow near its nesting cavity on a bank of the Patapsco River, Howard Co., Maryland (5/20/2007).

Below: A Northern Rough-winged Swallow in Washington Co., Maryland (5/5/2010).

A Northern Rough-winged Swallow in Washington Co., Maryland (5/5/2010). Photo by Bill Hubick.

Below: A Northern Rough-winged Swallow at Rocky Gap SP, Allegany Co., Maryland (4/20/2008).

A Northern Rough-winged Swallow at Rocky Gap SP, Allegany Co., Maryland (4/20/2008). Photo by Bill Hubick.

Below: A Northern Rough-winged Swallow nesting cavity in Calvert Co., Maryland (7/9/2006).

A Northern Rough-winged Swallow nesting cavity in Calvert Co., Maryland (7/9/2006). Photo by Bill Hubick.