Publication Date

Spring 5-6-2025

Document Type

Student Project

First Advisor

Koop, Jennifer

Degree Name

B.S. (Bachelor of Science)

Department

Department of Biological Sciences| Other

Abstract

Bird-window collisions are a major source of avian mortality, particularly in urban environments where glass structures are prevalent. At Northern Illinois University (NIU), systematic monitoring conducted between 2019 and 2024 revealed Montgomery Hall to be the building with the highest incidence of bird strikes. This project aimed to test the effectiveness of a cost efficient bird strike mitigation strategy using grease marker frit dots on Montgomery Hall’s skybridge windows. We applied white dots spaced four inches apart and compared strike data collected during fall migration seasons before (2018–2022) and after (2024) dot application. While limited to one post-treatment season, results showed a decrease in strikes—from an average of 3.25 per season to 2—suggesting a promising reduction. Though not statistically testable at this stage, these findings support prior research indicating the efficacy of visual window markers in reducing collisions. This study underscores the importance of student-led conservation initiatives and presents a low-cost mitigation model suitable for campuses and public institutions with limited resources. Further data collection is recommended to confirm long-term effectiveness and inform broader implementation strategies.

Suggested Citation

Marcinkowski, S. (2025). Flying Safe: Reducing Bird Strikes at Northern Illinois University (Honors Capstone, Northern Illinois University)

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