Back at the end of November I took a call whilst working from an observer out in the field in Cumbria wanting to report some Brambling. The observer in question had a decent flock for the UK at Talkin Tarn of c.2000 individuals. I was impressed. I saw this video tonight on Birdforum and was even more impressed. This is a wintering flock in the Basque country in Northern Spain about a week ago.
The estimate for this flock is c.1million individuals, some sight.