Nêu nội dung và trình bày lại bài Have you ever heard the saying the early bird catches the worm? It means that whoever gets to an opportunity first is most likely to do well. Birds do eat worms, and they also certainly do wake up early in the morning and start chirping and singing! Certain birds make massive journeys every year, migrating from cold to warm climates. This seems like very hard work; some fly almost halfway around the Earth. Bird watchers like to observe the times of these birds journeys, and search for them when they arrive at their destination. Of course, not all birds travel like this. Some birds, like turkeys, cant even fly at all.