Egg mass/cocoon?

Egg mass/cocoon?

Observation - Egg mass/cocoon?. Description: On pondside reed. Looks like some sort of silken cocoon/egg mass - I'm aware of some North American noctuids ('armyworms') that I think make something similar, but not sure if this is the same group.

On pondside reed. Looks like some sort of silken cocoon/egg mass - I'm aware of some North American noctuids ('armyworms') that I think make something similar, but not sure if this is the same group.