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OF THE THESIS THE DISTRIBUTION AND ABUNDANCE OF THE EXOTIC AND NATIVE URBAN AVIFAUNA IN MIAMI-DADE COUNTY FLORIDA by Omar Z. Abdelrahman Florida International University, 2000 Miami, Florida Professor Victor Apanius, Major Professor Southern Florida is experiencing an unprecedented population expansion of several exotic avian species. To understand the impact of introduced species on the native bird community, I censused two transects that spanned older, urban, closed canopy (ca. 60 yr.old) to more recent (< 20 yr-old) suburban, open canopy habitats in Miami-Dade County, Florida for a 12-mo period. The recently introduced Eurasian Collared Dove (Streptopelia decaocto) was the most abundant species (92.7 birds/km2), but density varied across transects with lowest density (2.87 birds/km2) in older-growth habitat compared to the maximum density (210 birds/km2) in young habitat. The European Starling (Sturnus vulgaris) was second in abundance at 79.1 birds/km2. The Boat-tailed Grackle (Quiscalus major) was the third most abundant species (67.5 birds/km2). The Mourning Dove (Zenaida macroura), considered to be threatened by the Collared Dove (Simberloff et al. 1997, Schmitz and Brown 1994), was the next most abundant at (66.1 birds/km2). The House Sparrow (Passer domesticus) was evenly distributed and

The distribution and abundance of the exotic and native urban avifauna in Miami-Dade County Florida