Figure 1.
The entire study area depicting suitable habitat (light gray) determined by landcover data (Illinois State Geological Survey; Kentucky Geography Network) aerial photography and extensive surveys throughout the region.
Black patches within core survey area indicate nest box study sites located in the Cache River watershed and dotted lines depict state boundaries.
Figure 2.
The distribution of natal dispersal distances for one-year-old Prothonotary Warblers in southern Illinois, fledging during 1995–2009 and recaptured on nest box study sites and within the systematic survey area.
(A) The observed natal dispersal distance distribution for 222 female (black) and 207 male (gray) and (B) the distribution of observed natal dispersal distances relative to the number banded in that distance class (DDRR). Mean weighted DDRR and SEs for individuals banded prior to fledging are presented.
Table 1.
Model selection to estimate first-year apparent survival for Prothonotary Warblers, Protonotaria citrea, in southern Illinois, USA, fledging during 2004–2009.
Figure 3.
The relationship between fledge date (ordinal fledging date 136 = 15 May) and first-year survival for Prothonotary Warblers.
Model averaged estimates (mean 1SE) of warblers reared with Brown-headed Cowbirds (grey line) and in the absence of cowbirds (black line) in southern Illinois, USA, fledging during 2004–2009 are presented. All other variables were held at mean observed values.