Physical variability among nest foundresses in the polygynous social wasp, Polistes annularis Jeanne D. SullivanJoan E. Strassmann OriginalPaper Pages: 249 - 256
Sugar concentration and the structure of the sunbird's song Walter PflummHeinz ComtesseKarl Wihelm OriginalPaper Pages: 257 - 261
The effect of a “permanent” clock-shift on the orientation of experienced homing pigeons Wolfgang WiltschkoRoswitha WiltschkoWilliam T. Keeton OriginalPaper Pages: 263 - 272
Social and orientation behavior of Polyergus breviceps during slave-making raids Howard TopoffBrent LaMonMyrna Goldstein OriginalPaper Pages: 273 - 279
Search behavior of the checker-throated antwren foraging in aerial leaf litter Judy A. GradwohlRussell Greenberg OriginalPaper Pages: 281 - 285
The effect of multiple mating on genetic relatedness in larval aggregations of the imported willow leaf beetle (Plagiodera versicolora, Coleoptera: Chrysomelidae) David E. McCauleyRegina O'Donnell OriginalPaper Pages: 287 - 291
Predation risk and foraging behavior of the hoary marmot in Alaska Warren G. Holmes OriginalPaper Pages: 293 - 301
The importance of handling time for the flight directionality in bees Paul Schmid-Hempel OriginalPaper Pages: 303 - 309
Reproductive synchrony in the fieldfare (Turdus pilaris) in relation to spring arrival, nest predation and nestling starvation Christer G. Wiklund OriginalPaper Pages: 311 - 316
