Black-shouldered Spinyleg

Place name abbreviations: MPEA - Middle Patuxent Environment Area; PRSP - Patuxent River State Park; PVSP - Patapsco River Valley State Park; WMA - Wildlife Management Area.

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Legend:

Species common name
Scientific name
Length (in inches; M and F if different) Flight season
Relative abundance
Habitat.


Black-shouldered Spinyleg
Dromogomphus spinosus
2.1-2.6" E-May — E-Sep
Common.
Habitat: Clean rivers and streams (tolerates some pollution); sand substrate. Secretive, flies in woodlands away from breeding areas. Perches on logs and rocks w/ clear view of nearby water. Can occur in degraded habitat.
Black-shouldered Spinyleg (M)

Male
June 23, 2007
Old Frederick Road, PVSP
June Tveekrem

Black-shouldered Spinyleg (M)

Male
June 24, 2012
Woodstock, PVSP
Bonnie Ott

Black-shouldered Spinyleg (young adult)

Young Adult
June 18, 2016
Henryton, PVSP
Richard Orr

Black-shouldered Spinyleg (M)

Young Adult
June 18, 2016
Henryton, PVSP
Richard Orr

Black-shouldered Spinyleg (F)

Female
August 5, 2007
Big Branch, Triadelphia Reservoir
June Tveekrem

Black-shouldered Spinyleg (F)

Female
August 5, 2007
Big Branch, Triadelphia Reservoir
June Tveekrem

Black-shouldered Spinyleg (exuviae)

Exuviae
July 29, 2011
Pigtail, Triadelphia Reservoir
Jo Solem