Describe the nature of migration in birds. Include in your answer: a. a definition of migration...

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Biology

Describe the nature of migration in birds. Include in youranswer: a. a definition of migration b. descriptions of thehypotheses for the origin of migratory patterns and the evidence insupport of its northern origin c. the evidence for an endogenous,underlying genetic component for migratory behavior

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Nature of Migration in birds 1 Seasonally the timing of migration is influenced by internal clocks that are influenced by day length and perhaps also weather This topic was discussed in the last lecture 2 Over shorter time scales the exact timing of migratory movements is greatly influenced by the weather Birds tend to move when conditions favor flying in the direction they need to go eg when they have a tailwind when air turbulence is low when it is not raining 3 Many birds migrate at night There are several possible reasons for this a The atmosphere is more stable at night than during the day because there are fewer thermals updrafts caused by warming of the Earths surface b The air temperature is lower which may make thermoregulation easier flight generates a lot of heat that birds need to offload c See Answer

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