Patterns in the Relative Distribution of Carduelis psaltria (Lesser Goldfinch) with Respect to Various Habitats within San Timoteo Nature Sanctuary in Redlands, CA

Publication Year

Spring 2015


Lesser Goldfinch, San Timoteo, Riparian


Animal Studies | Population Biology | Terrestrial and Aquatic Ecology


Riparian zones have the unique characteristic of supporting a large ratio of organisms compared to their small area. The preservation of these areas is crucial for maintaining various avian populations as well as maintaining wildlife corridors, and other ecological services, that these areas provide. This study analyzed Lesser Goldfinch, Carduelis psaltria, and its frequencies of occurrence within various habitats surrounding and within the riparian strip in the San Timoteo Nature Sanctuary in south Redlands, CA. The frequencies, or visitation, for each observation site and for overall habitat type were analyzed to understand the usage of habitats in the sanctuary’s landscape. Results propose habitat type as having a significant influence on frequencies and further, that native and riparian habitats harbor higher frequencies. These results identify specific areas and vegetation within the sanctuary that should receive priority among current and future ecological restoration projects for the sanctuary. Focusing on these areas for preservation not only help the Lesser Goldfinch but also other species that make use of the sanctuary such as the Least Bell’s Vireo, Vireo bellii, a riparian breeding species that utilizes the sanctuary’s riparian zone in its summer breeding months.

Department 1 Awarding Honors Status


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