Lekking
Guides
Clusiidae
druid flies
A family of small acalyptrate flies (approximately 3.5 mm) commonly known as druid flies. The family comprises 636 species in 14 genera across three subfamilies, with highest diversity in tropical regions. Adults are typically found on tree trunks, while larvae inhabit decaying wood. Several genera exhibit lekking behavior and territorial defense by males.
Dinocampini
Dinocampini is a tribe of parasitoid wasps within the subfamily Euphorinae of the family Braconidae. Members of this tribe are known to exhibit complex mating behaviors including lek formation, as documented in the recently described species Napo townsendi. The tribe is represented in the Neotropical region, with observations from Ecuadorian cloud forest habitats.
Exapion ulicis
Gorse Seed Weevil
Exapion ulicis is a small seed-feeding weevil specialized on gorse (Ulex europaeus). Adults are light gray with a prominent snout roughly half the body length. The species is native to western Europe and has been introduced to New Zealand, California, Hawaii, and other regions as a biological control agent targeting invasive gorse populations. Larval feeding destroys seeds within pods, reducing plant spread, while adult feeding on stems and spines causes minor damage.
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rational-extensive-Pareto-optimal-individually-rational-Nash-stable-setminimal-weakly-retentive-Pareto-optimal-individually-rational-Nash-stable-setminimal-strongly-retentive-Pareto-optimal-individually-rational-Nash-stable-setminimal-collectively-retentive-Pareto-optimal-individually-rational-Nash-stable-setminimal-individually-retentive-Pareto-optimal-individually-rational-Nash-stable-setminimal-Nash-retentive-Pareto-optimal-individually-rational-Nash-stable-setminimal-individually-rational-retentive-Pareto-optimal-individually-rational-Nash-stable-setminimal-weakly-stable-Pareto-optimal-individually-rational-Nash-stable-setminimal-strongly-stable-Pareto-optimal-individually-rational-Nash-stable-setminimal-collectively-stable-Pareto-optimal-individually-rational-Nash-stable-setminimal-individually-stable-Pareto-optimal-individually-rational-Nash-stable-setminimal-Nash-stable-Pareto-optimal-individually-rational-Nash-stable-setminimal-individually-rational-stable-Pareto-optimal-individually-rational-Nash-stable-setminimal-weakly-Nash-stable-Pareto-optimal-individually-rational-Nash-stable-setminimal-strongly-Nash-stable-Pareto-optimal-individually-rational-Nash-stable-setminimal-collectively-Nash-stable-Pareto-optimal-individually-rational-Nash-stable-setminimal-individually-Nash-stable-Pareto-optimal-individually-rational-Nash-stable-setminimal-Nash-Nash-stable-Pareto-optimal-individually-rational-Nash-stable-setminimal-individually-rational-Nash-stable-Pareto-optimal-individually-rational-Nash-stable-setminimal-weakly-individually-rational-Pareto-optimal-individually-rational-Nash-stable-setminimal-strongly-individually-rational-Pareto-optimal-individually-rational-Nash-stable-setminimal-collectively-individually-rational-Pareto-optimal-individually-rational-Nash-stable-setminimal-individually-individually-rational-Pareto-optimal-individually-rational-Nash-stable-setminimal-Nash-individually-rational-Pareto-optimal-individually-rational-Nash-stable-setminimal-individually-rational-individually-rational-Pareto-optimal-individually-rational-Nash-stable-setGryllotalpa major
prairie mole cricket
Gryllotalpa major, the prairie mole cricket, is the largest cricket species in North America, endemic to the tallgrass prairie ecosystems of the south-central United States. Males exhibit a classical lekking mating system, constructing specialized acoustic burrows that amplify their calling songs to attract flying females from distances up to 400 meters. The species is threatened by habitat loss due to prairie conversion, with current populations restricted to fragmented sites in Oklahoma, Kansas, Missouri, Nebraska, and Arkansas. Research has documented unique acoustic behaviors, including harmonic chirps rather than trills, and vibrational communication between neighboring males through the soil.
Hemipepsis ustulata
Flamed Tarantula-hawk Wasp, tarantula hawk
Hemipepsis ustulata is a large spider wasp in the family Pompilidae, commonly known as a tarantula hawk. It is native to the Southwestern United States and is among the largest Hymenoptera, reaching up to 5 cm in length. Females hunt tarantulas, paralyzing them with a powerful sting to serve as living food for their larvae. Males exhibit complex lekking territorial behavior, defending prominent perches on hilltops to intercept receptive females. The species has matte black coloration with rust-orange wings, distinguishing it from the iridescent blue-black Pepsis species.
Korscheltellus gracilis
Conifer Swift Moth
Korscheltellus gracilis, the Conifer Swift Moth, is a hepialid moth native to eastern and central North America. Adults are active at dusk and exhibit a primitive mating system where males form aerial lek swarms to attract females. Larvae are root-feeders primarily associated with coniferous trees, particularly balsam fir and red spruce, though they can survive on deciduous hosts. The species is considered a forest pest due to larval damage to tree roots and associated pathogen entry points.
Rhamphomyia longicauda
Long-tailed Dance Fly
Rhamphomyia longicauda is a dance fly species renowned for its exceptional sex-role reversal in mating behavior. Females form aerial leks at dawn and dusk, displaying inflated abdominal sacs and ornamental leg scales to attract males, who are the choosy sex. Females are obligate recipients of nuptial gifts—prey items captured by males—because they cannot hunt for themselves. This nutritional dependence drives the reversal of typical courtship roles. The species has been extensively studied as a model for sexual selection and the evolution of female ornamentation.