What is the biggest threat to butterflies? Arah August 18, 2020 20:36 Updated The biggest threat to butterflies is loss of their habitat. Related articles How many eyes do caterpillars have? How far can painted ladies fly? What's the difference between and chrysalis and a cocoon? What is the difference between a moth and a butterfly? What kind of fruit can my butterflies eat? Comments 0 comments Please sign in to leave a comment.