Decomposition and nutrient cycling are heavily dictated by biotic and abiotic conditions (e.g., climate, species interactions, resource availability) that vary seasonally depending on geographic location (Sharanowski et al. 2008, Sawyer et al. 2022). Carcass type and size also plays a notable role in the rate of decomposition and the associated vertebrate and invertebrate assemblages, creating major differences among the number of adult flies produced and associated bioconversion ratios (Kuusela and Hanski 1982). The correlation between necrophagous fly production and species composition across seasons provides valuable information regarding species richness, diversity, and evenness within a particular ecoregion, which may prove beneficial to applied sciences including, but not limited to, forensics, disease ecology, and conservation ecology. The goal of this study was to quantify fly production from carrion of different size and type across seasons in Central TX, USA. Percent biomass loss was shown to be significant (P< 0.0001) across two carcass types (P< 0.0391), European rabbit (Oryctolagus cuniculus) and domestic chicken (Gallus gallus). Total adult counts for blow flies (Diptera: Calliphoridae) produced across carcass types were also significant (P< 0.0001); large mammal carcasses produced nearly six-fold the number of adult flies compared to large birds with Phormia regina being the primary colonizer (78.12% of all specimens), highlighting the necessity of considering type and size of carrion in a variety of applicational studies.