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THE WILSON JOURNAL OF ORNITHOLOGY • Vo/. 123. No. 2. June 2011 
Tarsus (mm) 
species at JlTctaTstopov^ correfateti l ° its ,arSUS length for 31 arboreal insectivorous migrant 
Three types of foraging modes were identified 
based on Remsen and Robinson (1990: table 2). 
First, both Eastern Wood-Pewee and Acadian 
Flycatcher display a “passive search” strategy. 
Both species use open perches, sit and wait for 
prey, take long flights, and catch prey with a long 
sally Second, Summer Tanager (Piranha rubra). 
Scarlet Tanager (P. o/ivacea), Yellow-billed 
Cuckoo, and possibly Blue-headed Vireos use a 
medium-distance search mode.” They use 
medium to long distance flights, bouts of hopping 
IQQM nC f r ’ PerCh gleans t0 attack P re y (Chen 
1996). The other species, mostly warblers, adopt a 
“near-surface search mode” and mainly use hops, 
short flights, and near-perch maneuvers to catch 
prey. Remsen and Robinson (1990) separated 
species that flush-chase prey, such as Hooded 
Warbler and American Redstart (Setopfuiga ruli- 
cilla), into another foraging mode. We did not lind 
any difference in search behavior between these 
two species and odier near-surface searchers and, 
except for their conspicuous wing and tail flicking. 
Hooded Warblers have a search mode closer to 
vireos than to other warbler species. 
O'Brien et al. (1990) proposed that all seaith 
behavior could be placed on a “stop-and-go 
Gulf Coast stopover si tes ^ n'sprilig.^iTS- V ° rOUS mi S rant species were positively correlated to their wing lengths a 
