DON'T TOUCH THAT DIAL (Part Two)

I wrote back to Tony, the RSPB Press Officer: 

"Thank you for that, Tony. The one we had some years back was a slime mould. My money is on it being undeveloped frogspawn, or semi digested regurgitated frogspawn that something has pecked all the nuclei out of..."

He replied:

"Yes indeed, just had a vet from N Devon call me with a very credible explanation along those very lines"