The Eurasian Blue Tit is usually 12 cm (4.7 in) long with a wingspan of 18 cm (7.1 in) and weighs about 11 g. The bird has an azure blue crown and dark blue line passing through the eye, and encircling the white cheeks to the chin, giving the bird a very distinctive appearance. The forehead and a bar on the wing are white. The nape, wings and tail are blue and the back is yellowish green. The underparts is mostly sulphur-yellow with a dark line down the abdomen - the yellowness is indicative of the number of yellowy-green caterpillars eaten, due to high levels of carotene pigments in the diet. The bill is black, the legs bluish grey, and the irides dark brown.
Habitat and Distribution
Eurasian Blue Tits, usually resident and non-migratory birds, are widespread and a common resident breeder throughout temperate and subarctic Europe and western Asia in deciduous or mixed woodlands with a high proportion of oak. They are also common garden birds.
This bird prefers insects and spiders as food. Outside the breeding season, they eat seeds and other vegetable-based foods. The birds are famed for their skill, of clinging to branches and hanging upside down when looking for food.
The Eurasian Blue Tit will nest in any suitable hole in a tree, wall, or stump, or an artificial nest box. The nesting material is usually moss, wool, hair and feathers, and the eggs are laid in April or May. Seven or eight are laid, and bigger clutches are usually laid by two or even more hens.
Calls and Songs
It swings beneath the holder, calling `tee, tee, tee` or a scolding `churr`.