Yes. This is routinely done to study and mark the insects, and to capture rare species for endangered breeding programs. Scientists use good quality butterfly nets made of mesh, and handle the butterfly very carefully once they have captured it.
catch a butterfly
To catch a porcupine, you have to use a butterfly net then catch it.
to catch nature
One can find a guide on how to catch a butterfly on sites for butterfly collectors such as Dallas Butterflies and Butterflies and Things. Also, look at the local library.
With a very large butterfly net
Use a Butterfly Net or a Magic Butterfly net.
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No, butterflies do not have venom that can harm or kill humans.
you hold it by it two wings very gently ,then put it in a jar with holes or whatever make sure it could breath (try not to kill it ,put it back in the while after you do your research or whatever )you can also use a butterfly net to catch them
Yes.
Of course not! You shouldn't catch them. Butterflies you can catch, though. But birds, defenetly not. Just be careful when you catch a butterfly.