The journal publishes reviews and original contributions dealing with quantitative empirical and theoretical studies in the field of the analyis of animal behavior on the level of the individual population and community. Special emphasis is placed on the proximate mechanisms ultimate functions and evolution of ecological adaptations of behavior. Aspects of particular interest: Intraspecific behavioral interactions with special emphasis on social behavior Interspecific behavioral mechanisms e.g. of competition and resource partitioning mutualism predator-prey interactions parasitism Behavioral ecophysiology Orientation in space and time Relevant evolutionary and functional theory Purely descriptive material is not acceptable for publication unless it is concerned with the analysis of behavioral mechanisms or with new theory.