Florida woods cockroach

Florida Woods Cockroaches move through miniBIOTA's damp land habitats at night, eating litter and decaying plant material. Present since July 2025, they have been maintained through repeated additions but have not bred inside the system; the small April 2026 individual had been introduced while young.

Eurycotis floridana is a large, dark reddish-brown cockroach, typically 30 to 40 mm long, native to Florida and the Gulf coastal states of the southeastern United States. It is closely associated with damp, humid terrestrial habitats: mangrove forests, live-oak hammocks, palmetto scrub, and moist shoreline edges. It shelters during daylight hours under bark, in leaf litter, in tree hollows, and within dense canopy vegetation, becoming active at night to forage across the ground and through low canopy.

Florida Woods Cockroaches are detritivores and scavengers. They feed primarily on dead and decaying plant matter, leaf litter, fallen fruit, bark, and woody organic debris. Their mouthparts are adapted to processing tough, fibrous plant material that most invertebrates cannot digest efficiently. They do not require standing water but require humid air and damp substrate to avoid desiccation.

The species has a strong chemical defense: glands at the rear of the abdomen produce a foul-smelling secretion used to deter predators. This may partially account for their relative persistence in a system with Red House Spiders and other potential predators. Reproduction occurs through ootheca (egg cases), which females carry then deposit in concealed locations. Each ootheca contains up to 22 eggs. Nymphs hatch after several weeks to months and develop through multiple instars before reaching adulthood. The species is cold-sensitive and can be stunned by temperatures approaching 50°F.

Florida Woods Cockroaches are detritus processors in the terrestrial realm. By consuming dead plant matter and leaf litter across the Mangrove Forest, Lakeshore, Lowland Meadow, and Marine Shore edges, they break down tough fibrous material that would otherwise accumulate. Their feeding activity and frass return organic material to the soil and litter layer, contributing to decomposition and nutrient recycling in the terrestrial food web.

In miniBIOTA, they also interact with the rain system infrastructure. Their movement across the atmosphere reservoir system in January and February 2026 was hypothesized to have contributed to triggering the first rain event in the sealed system, though this was not confirmed. Their presence inside the atmosphere tank was documented as a management concern, with cockroach waste entering rain lines posing a potential clogging risk.

Florida Woods Cockroaches are prey for Red House Spiders in miniBIOTA. A deceased individual was found in a Red House Spider web on April 22, 2026. They have also been observed cold-stunned at approximately 50°F without being taken by a nearby Humic Marsh Crab, suggesting predation risk depends on the predator involved.

Florida Woods Cockroaches were first introduced on July 6, 2025 and have been supplemented by additional introductions in 2025 and 2026. No breeding has occurred in miniBIOTA.

July 6, 2025: Florida Woods Cockroaches were introduced. The initial count is unknown; about three were present before the later addition of five in October.

October 3, 2025: Five more Florida Woods Cockroaches were added to the system, bringing the estimated total population to eight.

January 13, 2026: A Florida Woods Cockroach fed on blended Creeping Primrose-Willow retained on Lakeshore land.

January 24, 2026: An individual in the upper corner of Mangrove Forest had a rear-body malformation, not an egg case. This was not evidence of breeding.

January 28, 2026: A cockroach lived in an atmosphere tank and left droppings near the rainwater collection area. The waste could obstruct rain delivery. A screen could exclude the roaches but might also restrict airflow; neither obstruction nor a tested solution was established.

February 2, 2026: A Florida Woods Cockroach was cold-stunned on the Mangrove Forest floor at approximately 50°F, barely moving after falling from a branch. A Humic Marsh Crab approached, foraged on detritus nearby, and passed the cockroach without interacting. Video evidence: approximately four minutes showing the cold-stunned cockroach, the crab approaching, foraging, and moving past without predation.

February 8, 2026: The first rain event after the full system seal occurred in Mangrove Forest. Cockroach weight on a suspended reservoir was one possible trigger for the sequence of tipping reservoirs; the cause remained uncertain.

March 17, 2026: One adult Florida Woods Cockroach was added to the system. Estimated population now approximately three.

March 20, 2026: A Florida Woods Cockroach was observed in the Lowland Meadow with a bulbous yellow protrusion at the rear of its body, described as appearing consistent with a prolapse. Individual health and reproductive viability were flagged for monitoring. Video evidence: close-up of the individual.

March 2026: Josue confirmed the March 20 protrusion as a prolapse (October 21, 2026). That individual's fate is unknown: several Florida Woods Cockroaches were dying of various unknown causes around then, and he never saw this one dead with the prolapse.

April 4, 2026: A tiny cockroach, which Josue believes is a Florida Woods Cockroach, was added to the Lowland Meadow and filmed there that night. April 12, 2026: One large adult Florida Woods Cockroach was added to the Lowland Meadow. If all previously observed individuals were still alive, estimated population now four.

April 22, 2026: A young Florida Woods Cockroach was on a Mangrove Forest branch. It had been introduced while small, rather than born in miniBIOTA. Another individual was dead in a Red House Spider web.

June 14, 2026: One medium-sized Florida Woods Cockroach added to the Lowland Meadow. No behavioral observations at time of introduction. Part of the ongoing supplementation effort; population count uncertain due to unquantified predation losses since April 2026.

June 22, 2026: One deceased Florida Woods Cockroach found in the Mangrove Forest biome. Cause of death unknown; age, predation, and environmental conditions are all possible. Based on the most recent population count of four, the estimated population is now three. No media.

July 6, 2026: The small nymph cluster in Prairie was Surinam Cockroach, not offspring of Florida Woods Cockroach.

August 3, 2026: During a full-system nighttime tour, a larger but still immature cockroach was observed in the Mangrove Forest, its appearance now more consistent with Florida Woods Cockroach than at its earlier nymph stage. It may be the same individual as a very small nymph introduced earlier under a tentative Florida Woods Cockroach identification; identity remains based on visual interpretation, not confirmed. The individual was confirmed not Surinam Cockroach, narrowing candidates to Florida Woods Cockroach or a currently unidentified species. The population was reassessed at four individuals: two adults, one late-stage juvenile or possible subadult, and one smaller juvenile nymph.

October 16, 2026: An unidentified nymph on upper Lakeshore glass was compared with Florida Woods Cockroach and Australian Cockroach because of stripes along its sides. Neither identity was established. Josue also had not spotted the believed remaining adult Florida Woods Cockroach for a few days. This was not a confirmed new individual, breeding event or mortality. On October 27, 2026, Josue identified the nymph as an Australian Cockroach from the yellow stripe on each side, so it is not a Florida Woods Cockroach.