Morphology, Development, Diversity, Ecological Functions, and Threats to Moths

Moths (Lepidoptera: Heterocera) represent a dominant group within the order Lepidoptera, playing indispensable roles in global ecosystems. This review synthesizes current knowledge on moth morphology, developmental processes, species diversity, ecological contributions, and the multifaceted threats they face. By examining their life cycle—encompassing egg, larva (caterpillar), pupa, and adult stages—we highlight their intricate physiological adaptations and evolutionary significance. With an estimated global diversity exceeding 255,000 species, moths surpass butterflies in ecological and taxonomic richness, contributing to nutrient cycling, energy transfer, pollination, and population regulation. However, anthropogenic pressures, including habitat destruction, light pollution, urban heat islands, and climate change, pose severe risks to moth populations, resulting in declines in species richness and abundance. Drawing on extensive literature, this study elucidates differential responses among moth families to environmental disturbances and proposes actionable conservation strategies, such as mitigating light pollution, restoring habitats, and enhancing monitoring programs. As ecological indicators, moths provide critical insights into environmental health. Future research should integrate interdisciplinary approaches to deepen our understanding of moth-ecosystem interactions, supporting biodiversity conservation efforts. This review aims to provide a scientific foundation for researchers and policymakers to advance moth conservation.