Question: In what New York county is a building in the shape of a duck, built by farmer Martin Maurer, located?

Context paragraphs:
New York County Courthouse: The New York State Supreme Court Building, originally known as the New York County Courthouse, at 60 Centre Street on Foley Square in the Civic Center district of Manhattan, New York City houses the Civil and Appellate Terms of the New York State Supreme Court for the state's First Judicial District, which is coextensive with Manhattan, as well as the offices of the New York County Clerk.

Wallace-Cross Mill: Wallace-Cross Mill is a historic grist mill located at East Hopewell Township, York County, Pennsylvania.  It was built in 1826, and is a 2 1/2-story, frame building on a stone foundation.  It has a gable roof with decorative bargeboard.  It has an 11 feet in diameter, 4 feet wide, steel water wheel to run the machinery.  The mill was given to York County by its owner in 1979.

William Shelly School and Annex: William Shelly School and Annex, also known as Eberton School, is a historic school building and annex located at West York, York County, Pennsylvania.  The building known as Shelly Annex was built about 1897 as a one-room school.  It was enlarged twice between 1898 and 1903, to be a 2 1/2-story, gable roofed brick building, three bays wide and seven bays deep.  The Shelly School was built between 1905 and 1908, in the Italian Renaissance style.  It is a two-story brick building, nine bays wide and seven bays deep.  It was completely rebuilt after a fire in 1919.  The property was sold in 1960, and the buildings utilized as storage facilities for the next 37 years.

Flanders, New York: Flanders is a hamlet and a census-designated place (CDP) in Suffolk County, New York, United States.  The population was 4,472 at the 2010 census.  It is the location of the Big Duck.

Big Duck Ranch: Big Duck Ranch, also known as the Maurer Duck Farm, is a historic ranch located in Flanders, Suffolk County, New York.  It operated as a duck ranch and retail store that sold duck products from 1936 to 1984.  The principal building on the site is the separately listed Big Duck.

York Dispatch Newspaper Offices: The York Dispatch Newspaper Offices is a historic commercial building located at York, Pennsylvania, York County, Pennsylvania.  It was built in 1887, and is a four-story, four bay brick building in the Italianate Revival style.  The building consists of two independent sections connected by an overhead walkway.  The front facade is built of cast iron and pressed metal and features decorative pilasters and long, slender windows.

Ebenezer Academy: Ebenezer Academy is a historic school building located at Rock Hill, South Carolina.  It was built about 1860, and is a one-story, rectangular brick structure of simple design.  The school was originally associated with Ebenezer Presbyterian Church until Rock Hill public schools were established about 1888 and was leased to York County for an elementary school.  The school continued until 1950 when it was deeded back to the church.  It is the oldest known school building standing in York County.

Barnett Bobb House: The Barnett Bobb House, also known as the Old Log House, is a historic building in downtown York, Pennsylvania, York County, Pennsylvania.  It was originally located at the intersection of Pershing and College Avenues.  In 1968, it was moved to its current location and restored.  It is on the same site as the General Horatio Gates House and Golden Plough Tavern.  It was built in 1811, and is a two-story log dwelling with dovetailed corners.  It houses a museum operated by the York County Heritage Trust that showcases family life during the 1830s.

Big Duck: The Big Duck is a ferrocement building in the shape of a duck located in Flanders, New York, on Long Island.  It was originally built in 1931 by duck farmer Martin Maurer in nearby Riverhead, and used as a shop to sell ducks and duck eggs.  It was added to the National Register of Historic Places in 1997.  It is a principal building on the Big Duck Ranch, listed on the National Register of Historic Places in 2008.

West Side Sanitarium: West Side Sanitarium, also known as West Side Osteopathic Hospital, is a historic sanitarium complex located at West York, York County, Pennsylvania.  The complex consists of four buildings: two large medical buildings and two residences.  The Sanitarium was originally built as a hotel in 1905, and doubled in size in 1924, with an addition and rear ell.  It is a 3 ⁄ -story, Dutch Colonial Revival-style brick-and-frame building with a gambrel roof.  It measures approximately 110 feet wide and 31 feet deep.  The Nurses' Home and Sanitarium Annex was built in 1924, also in the Dutch Colonial Revival-style.  It is a 3 ⁄ -story, 28-foot-wide by 30-foot-deep, frame building, expanded in 1931, with a 4-story rear addition measuring 25 feet wide by 34 feet deep.  It features a one-story full-width porch with Tuscan order columns.  The Doctors' Home and Dr. Meisenhelder's Home and Office were built in 1905, and are in a vernacular Queen Anne style.  They are 2 ⁄ stories tall with cross-gabled, slate-covered roofs and each measure about 20 feet wide by 40 feet deep.  Three of the four buildings are connected via underground tunnels.  The hospital remained in operation until 1962, after which the buildings housed a business college then home to the Aquarian Church of Universal Service.

Supporting paragraphs: Flanders, New York Big Duck
Answer: Suffolk County