<p>Flower-visiting insects are often under predation risk when foraging on flowers, driving behavioral adaptations to recognize and avoid predator traits or other foreign shapes upon flowers. However, it is not well understood how flower and flower-visiting insect traits predict behavioral responses of flower-visiting insects in the face of predation risk or how they distinguish the predator from objects with less potential risk (i.e., neophobia). Here, we conducted a field experiment using seven neotropical plant species to test the effect of simulated predation risk (i.e., artificial crab spider model) and neophobia (i.e., spherical object). Flower-visiting insects differently recognized and avoided flowers with crab spider models from flowers harboring spheres and flowers without any objects. However, the magnitude of predation risk and neophobia effects was smaller in larger flowers likely because they decrease the conspicuity of predator traits or other objects with some potential risk. In addition, the flower-visiting insect avoidance in response to predator risk decreased with body size, with larger insects being less responsive to predation risk and neophobia. Our findings shed new light on predation risk effects on multiple flower-visiting insects’ assemblage, showing that the predator-insect-plant tritrophic interactions are dependent on both insects and flower traits.</p>