AT A GLANCE
Common Name: Ayersthey Trap-jaw Ant
Scientific Name: Strumigenys ayersthey
Category: Invertebrates
Subcategory: Ants
Size: Worker body length: 0.09–0.11 in (2.3–2.8 mm); Mandible length: 0.03 in (0.8 mm)
Weight: 0.00003–0.00005 oz (0.8–1.4 mg)
Lifespan: 1–2 years for worker ants in native colonies
Diet: Specialized predator (collembolans, springtails, and minute soil arthropods)
Habitat: Primary Chocó tropical rainforest leaf litter and fungal mats
Range: Reserva Río Canandé, Esmeraldas Province, northwestern Ecuador
Conservation Status: Vulnerable (IUCN Red List; threatened by oil palm deforestation)

Overview

Strumigenys ayersthey is a rare miniature dacetine trap-jaw ant described in 2021 from the hyper-diverse Chocó rainforest of Ecuador. Celebrated as the only organism named with the non-binary honorific ‘they’, it represents an evolutionary pinnacle of specialized ambush predation among miniature soil organisms.

Biology and Physical Characteristics

Features remarkable elongate mandibles capable of opening 170 degrees and locking under elastic tension. When sensory trigger hairs encounter collembolans (springtails), the spring-loaded jaws snap shut in micro-seconds, impaling elusive prey instantly. The exoskeleton displays intricate reticulate sculpting and smooth glossy gastral plating.

Behavior and Ecology

Moves cautiously through subterranean leaf litter in small colonies consisting of fewer than 100 workers. Uses specialized camouflage posture, freezing motionlessly when disturbed to blend into decomposing vegetation before launching lightning ambush strikes.

Conservation and Human Impact

Vulnerable due to accelerating agricultural conversion for oil palm plantations and timber logging within the fragmented Chocó biodiversity hotspot of Ecuador. Preserved within private NGO cloud forest reserves.

Interesting Factoid

Strumigenys ayersthey was named in honor of artist and activist Michael Stipe and non-binary individuals worldwide, sporting spring-loaded jaws that snap shut thousands of times faster than the blink of an eye.

Last updated: October 2026