Since 2017, volunteers at Minnesota Valley NWR have tracked the phenology of deciduous trees and nectar plants that are important for migratory birds, pollinators and resident wildlife species. Observations of the timing of life cycle events of these species will shed light on potential mismatches in timing between plants and the animals that use them. The Refuge is part of a corridor of land and water stretching nearly 70 miles along the Minnesota River and hosts three sites along an urban-rural gradient. Multiple individuals of each species are monitored to allow comparison within and among sites, contribute data to the national effort to understand how seasonal activities of plants and animals are shifting, and engage volunteers in citizen science.