Birds

Great Tit

Parus major · also called great titmouse

Least Concern ↑ omnivore Temperate forest Temperate grassland

The great tit is the loud, confident one at the bird feeder — bigger than the blue tits, black-headed, yellow-breasted, with a black stripe running down its front like a tie. It is one of the most familiar birds in Europe, and, because it nests so readily in boxes, one of the most intensively studied wild animals anywhere.

Overview

Parus major is the largest tit in Europe, about 14 cm long, with a glossy blue-black head, white cheeks, a greenish back, and a yellow breast divided by a black central stripe. It lives in woodland, parks, hedgerows, and gardens across Europe, North Africa, the Middle East, and temperate Asia, and it does not migrate. In summer it eats caterpillars and other invertebrates; in winter it turns to seeds, nuts, and feeder food.

A bird that talks a lot

The great tit has one of the largest vocabularies of any songbird, around 40 different calls, and its ringing teacher-teacher song comes in dozens of local variations. Its black breast stripe is a status badge — broad and glossy in dominant males, narrow in subordinates and females — and other great tits respond to it in contests.

The scientists’ bird

Because it takes to nest boxes, is easy to catch, and is common everywhere, the great tit anchors some of the longest-running studies in ecology, including one at Wytham Woods near Oxford that has continued for over sixty years. Great tits have taught biologists about clutch size, animal personality, and whether wildlife can keep pace with warming springs, since the caterpillar peak their chicks depend on now comes earlier than it used to.

Status

The great tit is Least Concern and stable or increasing, helped by garden feeding and nest boxes. It is among the most common garden birds across its range.

Great Tit: common questions

How do you tell a great tit from a blue tit?

Size and head pattern are the main clues. The great tit is noticeably bigger, about 14 cm long and chunkier, with a glossy blue-black cap and a black bib that extends as a stripe down the middle of a bright yellow breast, and its back is greenish. The blue tit is smaller and daintier, with a sky-blue cap, a white face crossed by a dark eye-stripe, a blue-and-yellow body, and no black breast stripe. Both come to feeders together, so a direct comparison is easy, and the great tit is the one that looks like it is wearing a black tie down a yellow shirt.

What does the black breast stripe on a great tit mean?

It works as a badge of status. The stripe is wider, longer, and blacker in dominant, well-fed adult males, and narrower and duller in females, young birds, and subordinate males. Other great tits appear to read it, and a bird with a bold stripe wins more contests at feeders and defends territory more successfully, while experiments in which researchers widened the stripe with a marker pen changed how other birds responded. So the stripe honestly advertises fighting ability and condition, saving both birds the cost of an actual fight in many encounters.

Why is the great tit so important in scientific research?

It ticks every box for a study animal. It is common and widespread, it is bold and easy to trap and colour-ring, and above all it takes readily to nest boxes, so researchers can control and monitor where it breeds, weigh and measure every chick, and follow marked individuals across their whole lives. Populations in places such as Wytham Woods near Oxford and the island of Vlieland in the Netherlands have been studied continuously for more than sixty years. Great tits have been central to discoveries about clutch size, personality types in animals, the heritability of behaviour, and how wildlife is or is not keeping pace with climate change.

Do great tits really eat other birds and bats?

Occasionally, and mostly under stress. The great tit is primarily an eater of caterpillars, insects, and seeds, but it is an opportunist with a strong, sharp bill, and in hard winters when normal food is scarce it has been filmed and recorded killing roosting pipistrelle bats as they emerge from hibernation, and taking nestlings and eggs from the nests of other small birds, including in nest boxes. It typically pecks into the head to reach the brain. This is uncommon behaviour, concentrated in cold conditions and in a few well-documented locations, not a routine part of the species' diet.

Sources & further reading

Written by HideShark Editorial Team · reviewed by HideShark Science Desk. Published October 22, 2026. Last updated October 22, 2026.

Quick facts

Scientific name: Parus major
Diet: Caterpillars, spiders, and other invertebrates through spring and summer, especially to feed nestlings, switching in autumn and winter to seeds, beech mast, and nuts, and readily taking sunflower seeds and fat from garden feeders
The black stripe: A black band runs down the centre of the yellow breast, and it is broader and bolder in males than in females; a wide, glossy stripe signals a dominant, high-quality bird, and other great tits treat its owner accordingly
A remarkable vocabulary: The great tit has one of the largest call repertoires of any songbird, with around 40 distinct vocalisations, and its ringing two-note song, often written as teacher-teacher, varies so much that it is said if you hear an unfamiliar bird call in a European wood, it is probably a great tit
The milk-bottle raiders: In twentieth-century Britain great tits and blue tits learned to peck through the foil caps of doorstep milk bottles to reach the cream, and the habit spread across the country as birds copied one another, a classic case of animal cultural transmission
It kills in hard winters: Normally an insect and seed eater, the great tit will in cold winters kill and eat hibernating bats and the chicks of other small birds, pecking into the skull, one of the few small songbirds recorded doing this
A workhorse of science: Because it breeds readily in nest boxes and is easy to catch and mark, the great tit is one of the most studied wild birds in the world, central to long-term research on breeding timing, personality, and how animals respond to a changing climate
Timing its brood to the caterpillars: Great tits time their single large clutch so the chicks hatch at the peak of caterpillar abundance in the oak canopy, and studies show that as springs warm the caterpillar peak has advanced faster than the birds can keep up in some woods
Range: Woodland, parks, hedgerows, and gardens across Europe, North Africa, and the Middle East, and east across temperate Asia; it is a resident, non-migratory bird through most of this range.
Conservation status: Least Concern ↑ ≈ Very large and generally stable or increasing across its range, helped by garden feeding and nest boxes; it is one of the most common and familiar birds in European gardens and woodlands in the wild