Comparative biology and behavior of monogamous pairs and one male-two female trios of Herring Gulls Mary A. FitchGary W. Shugart OriginalPaper Pages: 1 - 7
Predation risk and vigilance in the blue tit (Parus caeruleus) Dennis William Lendrem OriginalPaper Pages: 9 - 13
Competition for the home and aggressive behaviour in the chiton Acanthopleura gemmata (Blainville) (Mollusca: Polyplacophora) Guido ChelazziStefano FocardiRiccardo Innocenti OriginalPaper Pages: 15 - 20
Influence of the courtship song of the acridid grasshopper Gomphocerus rufus L. on the female Klaus Riede OriginalPaper Pages: 21 - 27
Spring emergence schedules and vernal behavior of Richardson's ground squirrels: why do males emerge from hibernation before females? Gail R. Michener OriginalPaper Pages: 29 - 38
Alternative male mating tactics in Bembecinus quinquespinosus (Hymenoptera: Sphecidae): correlations with size and color variation Kevin M. O'NeillHoward E. Evans OriginalPaper Pages: 39 - 46
Caste and division of labor in leaf-cutter ants (Hymenoptera: Formicidae: Atta) Edward O. Wilson OriginalPaper Pages: 47 - 54
Caste and division of labor in leaf-cutter ants (Hymenoptera: Formicidae: Atta) Edward O. Wilson OriginalPaper Pages: 55 - 60
The ecology of parental care in a terrestrial breeding frog from New Guinea Martin P. Simon OriginalPaper Pages: 61 - 67
Advantages and a disadvantage of large size for male gammarus pulex (Crustacea: Amphipoda) Paul I. Ward OriginalPaper Pages: 69 - 76
Initial orientation of homing pigeons at the magnetic equator with and without sun compass R. RanvaudK. Schmidt-KoenigO. C. Gasparotto Short Communication Pages: 77 - 79