Overview
- The paper, published July 16 in Trends in Ecology & Evolution, reviews field and experimental studies showing widespread anticipatory behaviors such as increased vigilance, quieting, scent marking, lookouts, coordinated raids, and extra grooming or play.
- Scientists found that these preparatory tactics change how animals use space by increasing territorial signals, avoiding rival areas, returning to past contest sites, or actively raiding neighbours to reduce risk or gain advantage.
- The strength and form of preparation scale with perceived threat factors, with more intense behaviour when rivals are likelier to be encountered, larger, less familiar, or more aggressive.
- Authors argue these routines can affect fitness, population dynamics, and community structure and raise the possibility that repeated intergroup pressure could shape social cognition, though causal links remain unproven.
- Key open questions for future work include how animals detect threats (immediate cues versus memory), which cognitive abilities are required for planning, and how researchers can measure long-term evolutionary effects.