Effectiveness of different colors of aerial fruit-baited traps for trapping Cerambycidae and Cetoniidae beetles (Insecta: Coleoptera) in the Amazon rainforest.

This article investigates the influence of trap color on the effectiveness of fruit-baited aerial traps in sampling Cerambycidae and Cetoniidae beetles in the Amazon rainforest. Four trap colors—blue, yellow, red, and transparent (control)—were tested across five forest sites over two years. Results showed no significant differences in species richness or assemblage structure among trap colors for either beetle family; however, blue traps captured fewer Cerambycidae individuals, and transparent traps yielded higher Shannon and Simpson diversity indices for Cerambycidae. For Cetoniidae, trap color did not significantly affect diversity metrics, though one abundant species (Hoplopyga liturata) was more frequently caught in transparent traps. The study concludes that transparent traps are efficient, practical, and cost-effective for sampling these beetle groups in tropical forests, providing a useful protocol for biodiversity surveys and ecological monitoring in the Amazon.