Background: Insect biodiversity is a critical indicator of ecosystem health, yet rapid habitat transformation in tropical agro-ecological zones has accelerated species loss at an alarming rate. Understanding species distribution across heterogeneous habitats remains a priority for conservation biology and integrated pest management.

Objective: This study aimed to comparatively assess insect species richness, abundance, and diversity indices across five distinct habitat types — forest edge, grassland, wetland, urban green space, and agricultural land — within a simulated tropical study zone.

Method: Systematic sweep-net sampling, light-trap collection, and pitfall trapping were conducted across 25 sampling plots over 12 months. A total of 534 insect specimens were identified to order and family level. Diversity was quantified using Shannon-Wiener (H'), Margalef richness (d), and Sørensen similarity indices. Data were analysed using SPSS v26 and R v4.2.

Key Results: Wetlands recorded the highest species richness (167 species, H' = 3.12), while urban green spaces showed the lowest diversity (54 species, H' = 1.87). Coleoptera dominated the community (31.2%), followed by Lepidoptera (21.9%). Habitat type significantly influenced species composition (ANOVA, F = 14.32, p < 0.001).