Will Krohn
Purple Martins are the largest species of swallow in North America and, in the east, they nest almost entirely in human-constructed nesting colonies. Southeastern PA is one of two strongholds for Purple Martins in the state, and some of the largest colonies in Pennsylvania are in Chester and Delaware Counties. Purple Martins are a model organism for studying the migration and movement of songbirds due to their large size, conspicuous nature, and proximity to humans. They’re also a strong indicator of overall ecosystem health. Will's research seeks to uncover the rates at which young Purple Martins return to and disperse from the natal colony after hatching. Understanding how far Purple Martins travel from the natal colony is especially important since humans must construct all nesting colonies for the species. Purple Martins have declined by approximately 38% since 1970, so quantifying the rates and distances at which martins disperse will be a key tool for the conservation and management of the species. The Pennsylvania Game Commission and potentially other agencies will be able to use the information he collects in determining where they can best construct new colonies to bolster populations and connectivity, helping steer the recovery of this beloved bird.
Will Krohn is an M.S. student in Wildlife Ecology at the University of Delaware, studying dispersal in Purple Martins for his thesis. Will received his B.A. from Colgate University in 2023, where he double-majored in Biology and Environmental Studies. Since graduating, Will has worked as a technician on numerous avian research and conservation projects around the country, and in 2025, Will started his Master's at UD. Will is originally from Bucks County, PA, and he is an avid PA birder. In his free time, Will also enjoys rock climbing, hiking, and anything else that gets him out in nature.
Note: This meeting will be held in person at the meeting house and via Zoom. Zoom signon will start at 7:15 to enable the meeting to begin at 7:30.