Larger and polymorphic noctuid moths tend to show less inter-annual abundance variation in the canopy of a temperate forest

1. Inter-annual variation in insect abundance and seasonal phenology can be related to species traits such as body size, larval diet, overwintering stage, and colour variation.
2. We sampled noctuid moths in the canopy of a forest in Western Poland using flight-interception traps during two vegetative seasons.
3. We calculated inter-annual variation for 31 species, and the date of peak abundance and length of the flight season for 18 species.
4. We found that for the 23 species for which we had phylogenetic information, larger moths and those with adult colour variation showed less inter-annual abundance variation, which corroborates the results of previous studies.
5. We found no indication that phenological traits are associated with the tested species traits. However, species that can feed on the dominant broad-leaved tree in which the traps were placed (Quercus petraea) tended to have a later date of peak abundance than other species. To draw more robust conclusions, future research should encompass a longer time span and a broader range of species.