who is this person mentioned here?
A Greek philosopher and polymath during the Classical period in Ancient Greece.
Aristotle
Aristotle (; "Aristotélēs", ; 384–322 BC) was a Greek philosopher and polymath during the Classical period in Ancient Greece. 
where do birds go when they fly south The southern oceans. what is this phenomenon called? It is the regular seasonal movement, often north and south along a flyway, between breeding and wintering grounds. do changes in climate affect this migration? Yes, large scale climatic changes are expected to have an effect on the timing of migration. are there any scientists who observed or studied this phenomenon? Yes, Johannes Leche. historically, what were some of the views on this phenomenon? Aristotle noted that cranes traveled from the steppes of Scythia to marshes at the headwaters of the Nile.
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Aristotle [SEP] Introduction
Little is known about his life. Aristotle was born in the city of Stagira in Northern Greece. His father, Nicomachus, died when Aristotle was a child, and he was brought up by a guardian. At seventeen or eighteen years of age he joined Plato's Academy in Athens and remained there until the age of thirty-seven (c. 347 BC). Shortly after Plato died, Aristotle left Athens and, at the request of Philip II of Macedon, tutored Alexander the Great beginning in 343 BC. He established a library in the Lyceum which helped him to produce many of his hundreds of books on papyrus scrolls.