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Eastern Screech-Owl (Megascops asio maxwelliae) response to tree cover and climate in an understudied portion of its range
Eastern Screech-Owl (Megascops asio maxwelliae) response to tree cover and climate in an understudied portion of its range
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Eastern Screech-Owl (Megascops asio maxwelliae) response to tree cover and climate in an understudied portion of its range
Eastern Screech-Owl (Megascops asio maxwelliae) response to tree cover and climate in an understudied portion of its range

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Eastern Screech-Owl (Megascops asio maxwelliae) response to tree cover and climate in an understudied portion of its range
Eastern Screech-Owl (Megascops asio maxwelliae) response to tree cover and climate in an understudied portion of its range
Journal Article

Eastern Screech-Owl (Megascops asio maxwelliae) response to tree cover and climate in an understudied portion of its range

2025
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Overview
The habitat needs of common species can be understudied due to a focus on rarity and the prevention of extinction within traditional conservation policy and practice. Yet even common species are not immune to anthropogenic pressures on the environment, and understanding habitat needs for common species is critical information for management. This is the case for Eastern Screech-Owl (Megascops asio), a common species that is poorly studied in the west/northwest portion of its broad range across the central and eastern United States. Our objective was to explore environmental factors associated with Eastern Screech-Owl (M. a. maxwelliae subspecies) breeding season occupancy dynamics in this understudied region and to inform local land management efforts. To address this objective, we used 9 years of occupancy data (2013–2021) from a participatory science monitoring program in Fort Collins, CO, a mid-sized suburban city. We found that Eastern Screech-Owl persistence probability decreased while colonization probability increased with aggregation of tree cover and average breeding season temperature. We also found colonization probability increased with cumulative winter precipitation, and persistence probability decreased with average winter minimum temperature. Overall, our results suggest that this population of Eastern Screech-Owls responds to climate before and during the breeding season in complex ways, and that the species appears to experience high turnover in this study area along the western edge of its continental range. Our study highlights the importance of investigating how common species respond to their environment across the full extent of their distributions. En las políticas tradicionales y la práctica de la conservación, las necesidades de hábitat de las especies comunes pueden ser subestudiadas por el enfoque centrado en especies raras o para prevenir su extinción. Sin embargo, las especies comunes no son inmunes a las presiones antropogénicas en el medio ambiente y entender las necesidades de hábitat de éstas es información crítica para su manejo. Éste es el caso del búho Megascops asio, una especie común que ha sido escasamente estudiada en la porción oeste/noroeste de su amplio rango que cubre el centro y este de los Estados Unidos. Nuestro objetivo fue explorar los factores ambientales asociados con la dinámica de ocupación de la subespecie del este (M. a. maxwelliae) en esta región subestudiada e informar esfuerzos locales de manejo de la tierra. Para atender este objetivo, usamos 9 años de datos de ocupación (2013–2021) de un programa científico participativo de monitoreo en Fort Collins, Colorado, una ciudad suburbana de tamaño mediano. Encontramos que la probabilidad de persistencia de este búho decreció mientras la probabilidad aumentó con la agregación de cobertura arbórea y la temperatura media de la temporada reproductiva. También encontramos que la probabilidad de colonización se incrementó con la precipitación invernal cumulativa y la probabilidad de persistencia disminuyó con la temperatura media mínima invernal. En general, nuestros resultados sugieren que esta población de Megascops asio responde al clima antes y durante la estación reproductiva en formas complejas y que esta especie parece experimental un alto recambio en nuestra área de estudio en el margen oeste de su distribución continental. Nuestro estudio destaca la importancia de investigar cómo las especies comunes responden a su ambiente en todo su rango de distribución. PALABRAS CLAVE Ciencia ciudadana; ciencia comunitaria; ecología urbana; especies comunes; hábitat ripario; monitoreo participativo; ocupación