The shared biogeographic trends between plants and bees in global scale analysis remain unclear. Understanding these trends is crucial for biodiversity conservation and ecosystem services, particularly in desert biomes facing climate change and habitat loss. One hypothesis for high bee diversity in deserts is the specialization in life-history strategies shared by desert plants and bees, such as delayed emergence triggered by precipitation. Variability in precipitation in desert regions may explain the success of specialization and increase overall bee species richness. However, this hypothesis lacks sufficient evidence from other host-specialist distributions. Furthermore, the relationship between bee species richness and plant species richness in desert communities is not well-established. A large-scale analysis of specimen records for bees and angiosperms in the major North American deserts (Mojave, Sonoran, and Chihuahuan) is proposed to address this knowledge gap. This analysis will assess data quality, species richness, and precipitation regimes to better understand the diversity of bee and plant assemblages in these regions.