There are a number of ways to figure out the age of your budgie: Look at the stripes on its head: if they reach down to its beak, it's three to four months old. View the colors of its beak: dark—like black—beaks are a sign that your budgie is under 12 weeks old. Next, take a look at your bird's eyes: black eyes, with no visible irises, show the bird is less than five months old. If the budgie has a white iris ring, it's at least eight months old.