A: Jenny rises at 5 every morning.
B: She is an early bird.
A: And she eats like a bird.
B: Really? I cannot imagine it.
E.g. Charles began looking for a summer job in January; he knows that the early bird catches the worm.
E.g. The early birds get the best seats.
E.g. There were some early birds who arrived before the party was set to start.
E.g. The early birds were up at dawn and ready for breakfast.
E.g. I never miss sunrise. I'm an early bird.
Sb. eats like a bird.
Sb. is an early bird.