|Status: Summer Resident.||Last recorded on site in 2021|
|1987-1991: Confirmed||1992-1996: Likely but not confirmed|
|1997-2001: Confirmed||2002-2006: Confirmed|
|2007-2011: Likely but not confirmed||2012-2016: Likely but not confirmed|
|2017-2021: Likely but not confirmed
|The Patuxent web-site provides more general information about this species.|
|At this time of year, this species is uncommon on site.|
Occurs as a migrant and fairly common summer breeder in the marshy, cattail areas of the lab. There were no pairs breeding on site in the drought year of 1991 and numbers have increased only slowly since then.
Artist: Denis Kania.