What are the Risks of migration

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• Getting lost (blown off course or similar) and the effect of this when there is a limited fuel supply.
• Insufficient food to build up tissues to complete the trip.
• Increased chances of disease in weakened or exhausted birds.
• Unfavourable environmental changes (fire, flood, drought) on the migratory route limit the chance of all migrants making the journey safely.
• Unfavourable environments through events at destination that cannot be anticipated.
• Being predated on-route.
• Negative influence of human influence on the environment at staging sites.