Strong foraging preferences for (Saxifragales: Grossulariaceae) in the polyphagous caterpillars of Buff-tip moth (Lepidoptera: Notodontidae).

Herbivorous insects such as butterflies and moths are essential to natural and agricultural systems due to pollination and pest outbreaks. However, our knowledge of butterflies' and moths' nutrition is fragmented and limited to few common, charismatic, or problematic species.This gap precludes our complete understanding of herbivorous insects' natural history, physiological and behavioral adaptations that drive how species interact with their environment, the consequences of habitat fragmentation and climate change to invertebrate biodiversity, and pest outbreak dynamics.Here, we first report a population of the Buff-tip moth (Lepidoptera: Notodontidae) feeding on a previously unknown family of host plants, the mountain currant (Saxifragales: Grossulariaceae). This is the first report of a Notodontid moth feeding on Grossulariaceae hosts.Using no-choice and choice assays, we showed that has strong foraging preferences for a previously unknown hosts, the but also, although to a smaller extent, compared with a previously known host (the Norway maple sp.).These findings demonstrate that feed on-and show strong preference for Grossulariaceae host plants, indicating flexible physiological mechanisms to accommodate hosts plants from various families. This makes this species a potential model organism to study the behavioral and physiological mechanisms underpinning insect-plant interactions and diet breadth evolution.We discuss the broad ecological implications of these observations to the biology of the species, the potential negative effects of interspecific competition with endemic specialist moths, and highlight questions for future research.