You can just about make out there are now 5 eggs. I wonder how many she will lay.
My Collins Field Guide says bluetits normally lay between 7 and 12 eggs, sometimes from 5 to 16! As you can see from the Overview, I've never had any bluetit laying more than 12 eggs, and that has happened only once in 2009. I consider 10 to be a large clutch! The clutch sizes reported above this are always the result of two hens laying in the same nest, sometimes co-operatively and sometimes as a result of a second hen ousting one which has already started laying.
