Pest Organisms / Smokybrown Cockroach
Identification
Adults are big and a single even color all over, with no contrasting stripes or pale markings; UF describes the area behind the head as a uniform mahogany-brown to nearly black, the trait that defines the species, and that matching shield-and-body color is the quickest field tell. Both sexes are fully winged, the wings reaching past the abdomen, and the roaches fly well toward lights. Reported length varies by source: about 1–1¼ in (25–32 mm) per UF, up to 1½ in per Clemson and UGA. Source: https://entnemdept.ufl.edu/projex/gallery/dl/cockroaches/text/smokybrown_cockroach.htm Source: https://hgic.clemson.edu/factsheet/cockroach-control/ Source: https://fieldreport.caes.uga.edu/publications/B1412/
Young nymphs are dark to black with a giveaway pale band across the back and white antenna tips; they deepen to mahogany before reaching the adult color. Source: https://hgic.clemson.edu/factsheet/cockroach-control/ Source: https://ipm.ucanr.edu/PMG/PESTNOTES/pn7467.html