We propose a flexible model for a partially migrating species, which we demonstrate using yearly paths for golden eagles (Aquila chrysaetos). Our model relies on a smoothly time-varying potential surface defined by a number of attractors. We compare our proposed approach using varying coefficients to a latent-state model, which we define differently for migrating, dispersing, and local individuals. While latent-state models are more common in the existing animal movement literature, varying coefficient models have various benefits including the ability to fit a wide range of movement strategies without the need for major model adjustments. We compare simulations from the models for three individuals to illustrate the ability of our model to better describe movement behavior for specific movement strategies. We also demonstrate the flexibility of our model by fitting several individuals whose movement behavior is less stereotypical.

我们为部分迁徙物种提出了一个灵活的模型，我们使用金雕 ( Aquila chrysaetos ) 的年度路径来演示该模型）。我们的模型依赖于由多个吸引子定义的平滑时变势表面。我们将我们提出的使用不同系数的方法与潜在状态模型进行比较，我们对迁移、分散和本地个体的定义不同。虽然潜状态模型在现有的动物运动文献中更为常见，但不同的系数模型具有各种好处，包括能够适应各种运动策略而无需进行重大模型调整。我们比较了三个人的模型模拟，以说明我们的模型能够更好地描述特定运动策略的运动行为。我们还通过拟合几个运动行为不那么刻板的个体来展示我们模型的灵活性。