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...to analyze the impact of temperature, wind, and solar radiation on cattle behavior in winter (e.g. exposure to the sun, use of windbreaks). Individual cow's behavior in the field is partly influenced by group behavior and it's nearest neighbors, also known as "herd effect" (Shiyomi and Tsuiki, 1999; Shiyomi, 2004). For example: decision to use a windbreak depends on: a) wind speed, b) how many cows are already using it. Another example may be individual decisions on where to forage will depend on movement patterns of the herd and not just the topography. To avoid overe...