Dyschirius (Eudyschirius) erythrocerus
Geographic: NEO
Distribution: Native, New World. Bahama Islands – Great Iguana, South Bimini; Canada
– NB, ON, PQ; Cuba; México – YC; USA – AR, CT, DE, FL, IA, IL, IN, KS, KY, MA, ME,
MI, MN, NE, NH, NJ, NY, OH, PA, SD, VT, WI.
Common name: Red-horned Discolored Beetle
Synonym: Dyschirius erythrocerus LeConte, 1857:78
Macrohabitat: Lowlands, sea level – 307 meters altitude, on sea beaches,
muddy river banks, urban areas near woodlots, moist quarrys with sparse vegetation, and in
salt marshes. Microhabitat: Adults are ground-dwelling on exposed wet, clayish or muddy
substrate; and in salt marshes with vegetation such as Triglochin palustre L. and Plantago juncoides
Decne. Dispersal abilities: Macropterous, capable of flight; slow runners, strong burrowers.
Seasonal occurrence: Adults have been found in March – September, and November;
probably a spring breeder. Behavior: Adults are nocturnal, predaceous halobionts and take
cover during the day in burrows they dig into the substrate. or under surface debris. Adults
occasionally found at white and UV lights at night. In the northern part of their range, adults
overwinter in the substrate; in the southern part, they likely aestivate during the dry season
in the substrate.