Even when an intruder is far away, territorial male Broadley's flat lizards will charge them aggressively. However, when a familiar neighbor approaches, territorial males allow these individuals to get much closer. They will also pursue them for a much shorter span than an unfamiliar intruder. This finding illustrates the

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The dear enemy effect refers to the phenomenon where territorial animals show less aggression towards neighboring territorial rivals with whom they are familiar, compared to unfamiliar intruders. This is because the cost of aggression is often higher with unknown intruders, and there is a mutual understanding or recognition among familiar neighbors, reducing the need for aggressive encounters.

Even When an Intruder Is Far Away, Territorial Male Broadley's