This kind of insect is called "bean worm", also called bean Dan. Adults are not butterflies, but bean moths.

Belongs to larger insects.

In fact, this bug is not only used to feed birds, but also a very famous food, which is found in northern Jiangsu and Hebei. High protein, low fat, rich in seven kinds of amino acids that the human body can't synthesize, has a good health-preserving effect. ...

These are just some knowledge reserves. If I really want to eat this ... I have to throw up for a while. I have been afraid of this kind of bug since I was a child.

If it is in northern Jiangsu and Hebei, it is really a waste to feed this kind of thing to birds.