How to Understand Cockatiel Gestures (with Pictures) - wikiHow
Article Summary X. To understand if your cockatiel is happy, watch for it to wag its tail from side to side. Additionally, you will know your cockatiel is happy if it walks towards you with its head up. alternatively, your cockatiel might be angry if it puts its head down, ruffles its feathers, or flips upside down with its wings stretched out.
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