In a moment of affection, two Bald Eagles share a pearch near Viento State Park Monday afternoon. Winter is eagle-watching season along the Columbia River, as the birds depend upon the river for food as well as habitat for nesting, roosting, and wintering. Eagles that nest along the river are considered residents because they do not migrate. In contrast, the wintering population of eagles remains along the river for a short period of time. Wintering eagles fly in from as far off as Montana, typically arriving in November, and remain around the river until February or early March.