Context: Aristotle noted that cranes traveled from the steppes of Scythia to marshes at the headwaters of the Nile. Pliny the Elder, in his Historia Naturalis, repeats Aristotle's observations.

Question: Who noted that cranes traveled from Scythia to the Nile?
Answer: Aristotle

Question: Who repeats Aristotle's observations?
Answer: Pliny the Elder

Question: Where did Pliny the Elder repeat Aristotle's observations?
Answer: in his Historia Naturalis

Question: What kind of bird did Aristotle and Pliny the Elder write about?
Answer: cranes