BUL


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We did not quantify the extent or amount of woody vegetation associated with our study sites but it is possible the higher relative species richness in the Sandstone Prairies BUL study sites reflects a greater amount of woody vegetation associated with those sites.
2011, Powell and Busby 2013), a result of our study that may be of interest to conservationists is the fact that brown-headed cowbirds were the most abundant species we detected in both the Sandstone Prairies BUL and the Southeast Prairies BUL.
We detected three NNLP Tier I grassland bird species at study sites within the Southeast prairies BUL (loggerhead shrike, Bell's vireo, and Henslow's sparrow) but these species were not detected at study sites within the Sandstone Prairies BUL.
The Partners in Flight (PIF) Bird Conservation Plan for the Dissected Till Plains (Fitzgerald and Pashley 2000), a region that encompasses both the Sandstone Prairies BUL and the Southeast Prairies BUL, identifies four additional priority grassland bird species that we detected in our study; dickcissel, field sparrow, and grasshopper sparrow were detected at many study sites in both the Sandstone Prairies BUL and the Southeast Prairies BUL, while bobolink were only detected within the Southeast Prairies BUL (one of the state-owned Burchard Lake sites and at both of the privately-owned Johnson County sites).
Many of the grassland bird species we detected were only found at study sites within the Southeast Prairies BUL or had higher abundances in the Southeast Prairies BUL compared to the Sandstone Prairies BUL.
Relative abundance (mean [+ or -] SE individuals per point) of each species, and all individuals of all species combined, of breeding season birds detected during 10-minute point counts at study sites in the Sandstone Prairies Biologically Unique Land-scape (BUL) and the Southeast Prairies BUL during 2010 and 2011 (all data from both years combined).