Restoration of Grasslands and Nesting Success of Dickcissels (Spiza americana)

摘要: Abstract We compared abundance and nesting success of dickcissels (Spiza americana) between exotic-grass restored native-grass sites in the Blackland Prairie Region east-central Texas during March–July 2007 2008. Abundance was 44% greater on than exotic sites, but difference not significant. Daily survival nests 0.895 ± 0.013 SE 0.930 0.017 sites; there no significant sites. Mean height nest 56% higher mean substrate 58% detectability The relatively small we studied did improve daily may have acted as ecological traps, with result being a lower proportion successful nests, relative dickcissels.