Behavioral Ecology and Sociobiology publishes reviews, original contributions and commentaries dealing with quantitative empirical and theoretical studies in the analysis of animal behavior on the level of the individual, population and community. A new section, ''Methods'', considers submissions dealing with statistical procedures and their problems, as well as with problems related to measurement techniques. Special emphasis is placed on the proximate mechanisms, ultimate functions and evolution of ecological adaptations of behavior. Among aspects of particular interest are intraspecific behavioral interactions, with special focus on social behavior; interspecific behavioral mechanisms including competition and resource partitioning, mutualism, predator-prey interactions and parasitism; behavioral ecophysiology; orientation in space and time; and relevant evolutionary and functional theory. The Chief Editor is Tatiana Czeschlik, Heidelberg, Germany.