The butterfly mystery

Last Sunday, I saw a butterfly in the house. It was perched rather high up a wall, and refused to budge for the whole day.

The next day, it had flown to one of my lamps. It stayed there the whole day, and at the end of the day, I noticed some whitish liquid drops on the chair beneath the lamp. I wondered whether they were from the butterfly (was it pooping?!), and wiped them away.

The next morning, the butterfly was still there, and there were one or two fresh drops. Yes, it's from the butterfly! But what was it? I have no idea...

 

(I was also a little worried that it might have pooped on my floor elsewhere, but that the drops were camouflaged by the colour of my floor...)

 

After that, the butterfly disappeared for a while, and I thought it had left. But on Wednesday, I saw it again, near the front door.

The long patch below the butterfly is NOT a stain on the wall! It was something hanging from the butterfly. On Tuesday, I had already seen this "thing" hanging from the butterfly, when it flew away from my lamp to perch on the ceiling nearby.

After I saw it on that wall, the butterfly disappeared again for some time, and then that night (still on Wednesday), I saw it on the floor. I thought it was dead, and blew on it a bit to check, but it fluttered off. It was still near the front door, and this time it managed to go out. It landed on my car roof, and stayed there.

I didn't want to deal with it (wanted to go to sleep), so I just shut the door and hoped it would be gone by morning.

It wasn't gone.

 

Instead, it was really dead the next morning.

The two photos were taken from the same angle. But the wind happened to blow it over, so I got both angles of its (dead) body. If you look carefully, you can see the stringy ball at the end of its body.

I still wonder why it died, what was that dripping liquid, and what the hanging thread on its bottom was. So many mysteries...

(By the way, I didn't clear the butterfly away. I just drove my car, and let physics take care of it. :P )

Edit: A friend told me that it is a moth, again! I repeat: There seems to be a lot of moths around lately.