Title: Landing Dynamics of a Seagull Examined by Field Observation and Mathematical Modeling Show Chinese title

Title: 海鸥着陆动力学的现场观察与数学建模

Abstract: A seagull ({\it Larus crassirostris}) has a high ability to realize its safe, accurate and smooth landing. We examined how a seagull controls its angle of attack when landing on a specific target. First, we recorded the landing behavior of an actual seagull by multiple video cameras and quantified the flight trajectory and the angle of attack as time series data. Second, we introduced a mathematical model that describes how a seagull controls its speed by changing its angle of attack. Based on the numerical simulation combining the mathematical model and empirical data, we succeeded in qualitatively explaining the landing behavior of an actual seagull, which demonstrates that the control the angle of attack is important for landing behavior. Show Chinese abstract

Abstract: 一只海鸥（{\it 粗嘴鸥}）具有实现安全、准确和平稳着陆的高能力。 我们研究了海鸥在特定目标上着陆时如何控制其迎角。 首先，我们通过多台摄像机记录了实际海鸥的着陆行为，并将飞行轨迹和迎角量化为时间序列数据。 其次，我们引入了一个数学模型，描述了海鸥如何通过改变迎角来控制其速度。 基于结合数学模型和实证数据的数值模拟，我们成功定性地解释了实际海鸥的着陆行为，这表明控制迎角对于着陆行为非常重要。