My blackbird is incubating her eggs, leaving only briefly to feed. I managed to get a screen shot showing that she has at least three eggs…. there may be another tucked this side of the nest. Apparantly the most common clutch size is 3-4 eggs. We should have another week or so before they are due to hatch. I have seen nothing hardly of the male…. unlike the blue tit male who diligently fed his mate whilst she incubated the eggs.