No matter where they began their migration, the arctic terns flew an indirect route. As shown in the illustration, a common Atlantic Ocean route took an S shape. The reason? The birds simply take advantage of prevailing wind systems.
ეს ფრინველი შემოვლით გზას იმიტომ ირჩევს, რომ ჭარბი ჰაერის ნაკადს მიჰყვება.