Strong lungs

It's important for birds to make a strong impression first thing in the morning to remind everyone that it's a new day and they're just as powerful as when they went to bed. The louder they sing, the stronger they sound, so no other birds get any funny ideas about moving into their neighborhood.

Why do birds sing so early in the morning?

Why do birds sing so early? Early mornings are too dark to search for food, and too dark to be spotted by predators. That makes it the perfect time to sing. As there is less background noise and the air is so still, sound carries around 20 times further than it would later in the day.

Why do birds start chirping at 4am?

Birds chirp in the morning to announce their territory. This phenomenon is known as the dawn chorus. There are also other reasons why birds also chirp in the morning: to attract their potential mates, to utilize the morning quiet to sing and to keep occupied before visibility is enough to begin hunting.