ABSTRACT
Insect-plant interactions involve physiological adaptations by insects to secondary metabolic compounds synthetized by host plants, which are considered essential for the determination of resources partitioning of these insects. Data on such phenomena are important to understand evolutionary and ecological processes. However, climatic factors also seem to play a key role in affecting these patterns. The present study aimed to investigate the influence of seasonal variation on patterns of host plant use (Passifloraceae) by Heliconiini butterflies (Nymphalidae: Heliconiinae) at a Neotropical site in Southeastern Brazil. A total of 12 species of Heliconiini were reported, with nine of them being resident and using five species of Passiflora (Passifloraceae) as larval host plants. Three host plant species accounted for 97% of the total use, and the use varied along the seasons highlighting the plasticity boundaries in Heliconiini and possible limiting factors.
