Understanding the consequences of climate change for insect pollinators, plants, and their interactions is critical to sustaining ecosystems and the human food supply. While mounting evidence indicates that climate change is affecting bee abundance, studies are still scarce that document the mechanisms underlying these patterns. In particular, few studies have examined the consequences of climate change for bee reproductive output and survival during different life cycle stages. To fill this knowledge gap, this long-term study aims to understand the population dynamics of solitary bee species in the family Megachilidae. These species provide an ideal study system to identify the sensitivity of solitary bee demographic metrics to climate variation.