During my presentation, we will discuss: - Normal patterns of behavior (repertoire): social, food intake, territorial, agonistic, anti-predation, sleep and rest, play behavior, grooming, sexual(courtship and maternal), disposal, thermoregulation, exploratory, kinetic. - Characteristics and species - specific differences in the behavioral repertoires of rodents - Animal Welfare and its relationship to the behavioral repertoire of the species - Evaluation of the behavior pattern expression in animals bred and maintained in an animal facility - Applied Ethology in laboratory animals - Environmental Enrichment: concepts and examples of its application - Learning Objectives: - To understand normal behavior patterns in animal species frequently used in biomedical experimentation - To evaluate the proper development and expression of these patterns of behavior in animals kept in captivity in an animal facility and to relate it to Animal Welfare