Cosca Regional Park, Clinton, Maryland June 21, 2026

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Bonnie Ott and I joined the Maryland Biodiversity Program’s BioBlitz group at Louise F. Cosca Regional Park in Clinton, Maryland last Sunday (June 21, 2026).  Our focus was on the Dragonflies and Damselflies species that occurred in the Park, but we did keep records of the butterflies seen as well.  The main wetland (the large Pond/Lake) was drained (see: Cosca Regional Park Dam | Cosca Regional Park Dam. The lake … | Flickr ), plus most of the smaller streams had also become dry due to the draught.  As a result, our low Odonate count, I am sure, really does not do the Park justice.

DRAGONFLIES & DAMSELFLIES SEEN:

Ebony Jewelwings (Calopteryx maculata) – 20+

Variable Dancers (Argia fumipennis) – 8 – see: Variable Dancer on BioBlitz Day | Variable Dancer (Argia fum… | Flickr 

Blue-tipped Dancers (Argia tibialis) -- 9 - see: Blue-Tipped Dancer on BioBliz Day | Blue-tipped Dancer (Argi… | Flickr 

Familiar Bluets (Enallagma civile) – 3

Stream Bluets (Enallagma exsulans) – 6

Gray Petaltail (Tachopteryx thoreyi) – 1 – see: Gray Petaltail on BioBlitz Day | Gray Petaltail (Tachopteryx… | Flickr 

Unicorn Clubtail (Arigomphus villosipes) – 1

Dragonhunter (Hagenius brevistylus) – 1

Swamp Darner (Epiaeschna heros) – 1

Slaty Skimmer (Libellula incesta) – 1

Widow Skimmers (Libellula luctuosa) – 4

Common Whitetails (Plathemis lydia) – 15+

Wandering Gliders (Pantala flavescens) – 2

Spot-winged Gliders (Pantala hymenaea) – 8

Black Saddlebags (Tramea lacerata) – 6

 

BUTTERFLIES SEEN:

Eastern Tiger Swallowtail – 1

Cabbage Whites – 70+

Eastern Tailed Blue – 1

Great Spangled Fritillary – 1 – see: Great Spangled Fritillary on BioBlitz Day | Great Spangled F… | Flickr 

Appalachian Browns – 2 – see: Appalachian Brown on BioBliz Day | Appalachian Brown (Lethe … | Flickr 

Least skippers – 2

Horace’s Duskywing – 1

Little Glassywings – 2

 

ADDITIONAL PHOTO – Common Five-lined Skink – see: Five-Lined Skink on BioBlitz Day | Common Five-lined Skink (… | Flickr 

 

Richard Orr