Page 69 - EPUB OYW

The most amazing journey across the AmericasIt is thought that they have biological clocks and are good geographers because many recognize rivers, mountains and cities; some even say that they are great astronomers because they guide themselves by means of the sun, the stars and even the Earth’s magnetic field; others recognize chemical odors and marine currents.What is certain is that every year, millions of migratory species, whether by water, land or air, travel enormous distances over the American continent, some of them arrive in Costa Rica, in search of better climatic conditions, more abundant food or a suitable site for reproduction, which generally coincides with the warmer season. These odysseys are not exempt from great challenges; some species travel up to 20,000 miles round-trip.This happens with species of whales, bats, birds, fish, sea turtles and even insects like the monarch butterfly. Most flee the North American winter to seek food in the southern part of the continent, and then return to their feeding grounds in the north when their favorite foods sprout anew in the spring.