Monandry
Guides
Anthophora abrupta
Abrupt Digger Bee
Anthophora abrupta is a solitary digger bee in the family Apidae, native to North America. It is known for nesting gregariously, where females are attracted to existing nest sites through visual cues and pheromones. The species has been observed using root plates in forested habitats as nesting substrates. Females mate once, while males are capable of multiple matings.
Ischnura hastata
Citrine Forktail
Ischnura hastata, the Citrine Forktail, is a small damselfly with remarkable reproductive diversity across its range. Native populations in North America exhibit typical sexual reproduction, while populations in the Azores archipelago represent the only known example of parthenogenesis in the order Odonata. A population in the Galápagos Islands has evolved monandry (single mating per female), driven by extremely short adult lifespans of 1–3 days. The species occupies diverse wetland habitats from temperate North America to oceanic islands.
Naryciinae
Naryciinae is a subfamily of bagworm moths (Psychidae) characterized by monandrous females that mate only once. Females are immobile and wingless, while males are short-lived, non-feeding, and capable of multiple copulations. Several species exhibit parthenogenetic reproduction, including *Dahlica fennicella* and *D. triquetrella*. The subfamily serves as host for a diverse parasitoid wasp complex in northern European populations.
Osmia taurus
Taurus Mason Bee
Osmia taurus is a mason bee native to eastern Asia that was accidentally introduced to North America, first recorded in Maryland and West Virginia in 2002. The species has undergone rapid population expansion across the eastern United States, with established populations now confirmed in Canada (Ontario and Quebec). Its spread has been linked to commercial shipments of the intentionally introduced pollinator Osmia cornifrons, with which it is frequently confused. Population growth of O. taurus in the Mid-Atlantic region reached 800% over 15 years, coinciding with documented declines of 76–91% in six native mason bee species.