I checked the gull roost this evening, nothing unusual apart from an apparent lack of Yellow-legged gulls this autumn, just a single adult tonight, there were none on the last visit a couple of weeks back, in recent years they seem to average around 4-5 on most visits.
Arriving at 3:30pm the roost looked like it might form on the upper section of the reservoir so I walked up beyond the first inlet but by 4:45pm barely 2,000 LBBs had arrived and I decided to call it a night and head back. I hadn't got far when gulls began to arrive from the east and in big numbers with some others coming over the dam from the south. Setting up the scope on the north side of the inlet between 5pm and 5:15pm I counted 9,200 LBB with more out of sight at the very top of the reservoir. I've estimated something close to this previously but as far as I recall this is probably the largest count of LBBs I've made.
Other gulls counted before 4:30pm, 900 BH gulls, 10 Common gull, 4 GBBs (3 adult and a 1w), single adult Mediterranean, single adult YLG. Also 3 GC grebe, 2 heron, 2 Little grebe. No geese seen tonight.