Blob of black ....? on underside of Phragmites australis leaf about a foot off the ground. Along a ride at Woodwalton Fen. I thought it was just bird pooh but it looked odd in the hand lens.
No interactions present.
...but I've no idea which insect lays such a dense cluster of eggs as this.
Lat/Lng: 52.444292, -0.18938541
OS grid ref: TL231844