Arctic terns migrate massive distances to find resources and…
Arctic terns migrate massive distances to find resources and nesting sites depending on the time of the year. Over the past 40 years, these terns have begun their southward migration nearly two weeks earlier than they used to. A) Provide one proximate cause and one ultimate cause that could explain this earlier migration timing. (2 pts) Proximate: Ultimate: Terns are known to rely on two environmental cues when deciding when to migrate: day length (photoperiod) and temperature. B) Which cue would allow terns to best track changing resource conditions and why (a full credit answer will discuss both cues)? (2 pts)