What cocoon?

What cocoon?

Observation - What cocoon? - UK and Ireland. Description: I saw this cocoon, presumably from a recently-emerged insect, on a stalk just below two 6-spotted Burnets. What came from it? There were a lot of Burnets flying around at the time - could it have been one of those? The second picture shows the two Burn

I saw this cocoon, presumably from a recently-emerged insect, on a stalk just below two 6-spotted Burnets. What came from it? There were a lot of Burnets flying around at the time - could it have been one of those?

The second picture shows the two Burnets above the cocoon.