Parental investment and pair-bond behavior among canvasback ducks (Aythya valisineria, Anatidae) Michael G. Anderson OriginalPaper Pages: 81 - 90
Multiple maternity and paternity in single broods of apparently monogamous eastern bluebirds (Sialia sialis) P. A. GowatyA. A. Karlin OriginalPaper Pages: 91 - 95
Inheritance of nest sites in female Columbian ground squirrels M. A. HarrisJ. O. Murie OriginalPaper Pages: 97 - 102
The conflict between feeding and territorial defence in the great tit R. C. Ydenberg OriginalPaper Pages: 103 - 108
The use of Doppler-shifted echoes as a flutter detection and clutter rejection system: the echolocation and feeding behavior of Hipposideros ruber (Chiroptera: Hipposideridae) Gary P. BellM. Brock Fenton OriginalPaper Pages: 109 - 114
Growth costs of territorial overlap: experiments with juvenile lizards (Anolis aeneus) Judy A. Stamps OriginalPaper Pages: 115 - 119
Worker size variability and foraging efficiency in Veromessor pergandei (Hymenoptera: Formicidae) Steven W. RissingGregory B. Polloek OriginalPaper Pages: 121 - 126
Blue-winged warblers (Vermivora pinus) “recognize” dialects in type II but not type I songs Donald E. KroodsmaW. Roger MeserveyW. Matthew VanderHaegen OriginalPaper Pages: 127 - 131
Influence of insect hormones on the establishment of dominance hierarchies among foundresses of the paper wasp, Polistes gallicus Peter-Frank RöselerIngeborg RöselerRoger Augier OriginalPaper Pages: 133 - 142
Relatedness and microgeographic genetic variation in Rhytidoponera mayri, an Australian arid-zone ant R. H. CrozierP. PamiloY. C. Crozier OriginalPaper Pages: 143 - 150
Gregarious nesting of a digger wasp as a “selfish herd” response to a parasitic fly (Hymenoptera: Sphecidae; Diptera: Sacrophagidae) William T. Wcislo OriginalPaper Pages: 157 - 160
