In my house I have let several spiders live quietly especially in the hot and rainy season where there were many mosquitoes, in the end they ended up dying naturally but they were harmless spiders so it is completely understandable that you have taken that one out.
On the other hand beautiful captures of the butterfly despite having vibrant colors it looks beautiful, there are people who are afraid of butterflies and I'm surprised hahaha although I understand that if you see them very close maybe they are not so cute.