Read the following passage:

"Backyard birdwatchers enjoy getting acquainted with the birds they see at their feeders or during a neighborhood stroll. More dedicated birders thrill at every new entry on their life list and eagerly journey far and wide in search of new species. Watchers at all levels regularly contribute to scientific discoveries through bird counts and careful observations."

What is the implied main idea of this reading?


Birdwatching is a satisfying hobby for many people.


Both scientists and ordinary people are birdwatchers.


Birdwatchers like to travel.


Birds are watched wherever they go.