1. Why Is Social Behavior Rare in Reptiles? Lessons From Sleepy Lizards2. Behavioral Evidence of Felt Emotions: Approaches, Inferences, and Refinements3. Developmental Plasticity: Preparing for Life in a Complex World4. Covetable Corpses and Plastic Beetles-The Socioecological Behavior of Burying Beetles5. Mechanisms of Communication and Cognition in Chickadees: Explaining Nature in the Lab and Field6. Behavioral Adaptations to Invasive Species: Benefits, Costs, and Mechanisms of Change7. Scramble Competition Polygyny in Terrestrial Arthropods8. Communication in Animal Social Networks: A Missing Link?9. The Self-organization of Social Complexity in Group-Living Animals: Lessons From the DomWorld Model