Seminar title: Leveraging biodiversity big data to understand pollinator trends and inform conservation solutions | There are huge efforts -- by large institutions, community science groups, and individual research labs -- to collect and curate biodiversity data at unprecedented scales. There has also been tremendous growth in computational power and in the sophistication of statistical tools. Together these two currents offer exciting opportunities to gain critical insights into the processes that shape patterns of insect biodiversity and how global change is affecting these. However, doing so will require creative ways of approaching problems as the available data is often not at the ideal scale or resolution for answering the questions that are most interesting for science and pertinent for policy intervention. In my talk, I will highlight my recent developments in the occupancy-detection modeling framework that allow us to use data from historical collections to infer changes in species ranges. I will then present new evidence that both climate change and pesticide use have substantially altered the distribution of North American bees in the last century. Finally, I will present a new tool to select native plants for pollinator conservation.