Typically the eggs of this species are broad ovals, slightly compressed towards one end; the ground pure white and almost perfectly devoid of gloss, speckled and spotted with red or purplish red, the markings, most dense about the large end, often forming an irregular mottled cap or zone.  These are the general characters, but the eggs vary very much in shape, size, colour, and density of markings.  Some eggs are almost spherical; others are somewhat elongated; others slightly pyriform.  As a body, alike in shape and coloration, they remind one of the eggs of many species of Indian Tit, especially those of Lophophanes melanolophus.  In some eggs the markings are a slightly brownish brickdust-red, moderate sized spots and specks scattered pretty thickly over the whole surface, but gathered into a dense, more or less confluent, zone or cap towards the large end.  Intermingled with these primary markings a few pale purple spots are scattered towards the large end of the eggs.  In other eggs the markings are mostly mere specks, and in this type of egg the specks are mostly brownish purple, in some almost black.  Occasionally an egg is almost entirely spotless, having only towards the large end a clouded dingy reddish-purple zone.  In some eggs again the colour of the markings is pale and washed out.  As a rule, the eggs in which the markings are of the brickdust-red type have these larger, bolder, and more numerous; while those in which the markings are purple have them of a more minute character.

The shape of the eggs, as already noticed, varies much, being sometimes longer than those of P. trochilus, and at other times very much of the same rounded shape.  Frequently they are more pointed at the smaller end than those of P. trochilus usually are.  The texture of the egg is similar to that of P. trochilus, with scarcely any gloss.  The ground-colour is always pure white, and the markings, which are always more or less plentiful, are either reddish brown or purple-brown, intermingled sparingly with lighter or darker purple-grey.

Some eggs contain hardly a speck of the purple-grey, while others have considerable blotches of that colour scattered amongst the red spots.

Some eggs are scantily marked, and have the spots very small; while others are densely spotted and blotched, the spots often being more or less confluent at the larger end.  Frequently they accumulate round the larger end in the form of a confluent zone.  The variety with deep purple-brown spots, which is the rarest, resembles those of P. rufa in miniature; but, as a rule, the egg bears a much stronger resemblance to that of P. trochilus, though it is of course much smaller. As far as the colour goes, the representations in Hewitson’s work of the eggs of Parus cristatus, Parus coeruleus, and Phylloscopus trochilus will give a very correct idea of the different varieties of the egg of the present bird.