One Blue Tit clutch has risen from 2 eggs on the 24th to 11 eggs today. As they are capable of only laying one egg a day basic mathematics say that the nest should contain a maximum of nine eggs so at the moment I am assuming another female has dumped a couple in there. Hopefully tomorrow will be warmer.....
a site of egg dumping? - 11 eggs in 9 days. Something's wrong
Blue Tit 6 eggs
Blue Tit 7 eggs