What dual risk does the Swainson's Thrush face due to its habit of traveling vast distances?

Answer

Threats on breeding grounds and perilous nighttime journeys over continents

The Swainson's Thrush is characterized by its long-distance migratory behavior, necessitating immense energy expenditure and exposure to varied environmental risks across multiple regions. This extended travel results in facing dual perils: dangers present on their established breeding territories, and the inherent dangers associated with the migration itself. The text specifically highlights the threat posed by nighttime flights over large, featureless areas, where collisions with illuminated or reflective man-made structures, such as radio towers, result in fatality. Thus, survival requires successfully navigating threats on both ends of their journey and surviving the perilous transit between them.

What dual risk does the Swainson's Thrush face due to its habit of traveling vast distances?

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