1, different kinds of parrots have different standards of mouth shape. Ordinary parrots are generally T-shaped and V-shaped, and the inverted triangle is better. Most parrots in Yuanbao have crescent mouths, while macaws have serrated mouths. Pay special attention to the many crooked mouths of parrots, so be sure to pay attention to selection. In addition, the lower lip is not good-looking, and it is better to choose the lower lip adduction. The general principle is to form a smiling mouth when looking at it positively, so that people can like it.

2. The parrot's mouth can be used to bite nuts.