I have an 5-years old Budgie (male, unfortunately now is alone) in a cage.
I recognize when he's singing (for example when play with bell or hearing some sounds he likes). I also recognize when he wants to eat or drink (buckets are almost always full but when I'm all day outside and while he's hungry he chirps in particular way when I got home).
Yesterday he started chirping like when he's hungry but I noticed that he has food and water. But I'm sure that he wants something. What does it mean?