NESTING SUCCESS OF KENTUCKY AND HOODED WARBLERS IN BOTTOMLAND FORESTSOF SOUTH-CAROLINA

We Studied the nesting success of Kentucky Warblers (Oporornis formosu s) and Hooded Warblers (Wilsonia citrina) in 15 bottomland hardwood fo rests on the Savannah River Site, South Carolina, during 1993-1994, Th e Mayfield success rate for Kentucky Warbler nests (N = 26) and Hooded Warblers nests (N = 33) was 34.7% and 28.7%, respectively. The daily survival rate for Kentucky Warbler nests (0.952, SE = 0.018) did not d iffer (P = 0.157) from that for Hooded Warbler nests (0.941, SE = 0.01 4). Successful Kentucky Warbler pairs fledged more (P < 0.001) young ( 3.7, SE = 0.2) than Hooded Warbler pairs (2.7, SE = 0.2). Hatch-year b irds comprised a greater (P < 0.01) proportion of captured individuals for Kentucky Warblers (hatch-year:after-hatch-year = 2.2) than for Ho oded Warblers (hatch-year:after-hatch-year = 0.4), possibly reflecting the greater number of young produced per successful nest for the form er, and suggesting differences in postfledging survival or in fledglin g behavior between the species.