What sounds do budgies make?

Some of the symptoms are:

• Keeping their feathers puffed for extended periods while trying to retain heat
• They stay towards the floor of the cage
• Sneezing and abnormal breathing
• Abnormal droppings (note the quantity, color, consistency)
• Abnormal feathers, feather growth, or molt
• Abnormal sleep pattern
• Continuously on both feet on the perch when normally one foot is tucked up
• Head tucked under the wing for longer than usual periods
• Head turned towards the wing with eyes only partly closed