Predicting the response of a long-distance migrant to changing environmental conditions in winter.

Access to high-quality food is critical for long-distance migrants to provide energy for migration and arrival at breeding grounds in good condition. We studied effects of changing abundance and availability of a marine food, common eelgrass ( L.), on an arctic-breeding, migratory goose, black brant ( Lawrence 1846), at a key non-breeding site, Bahía San Quintín, Mexico.