What does a nightingale look like?

The nightingale is a small, fairly plain bird. Its back and wings are warm brown, its underparts are pale buff, and its tail is a distinctive rusty orange that it often flicks upward. It has no bold markings or bright colours, so it can be surprisingly hard to spot among leaves and undergrowth. The male and female look almost identical, which means the famous song is really the easiest way to know one is nearby.

Where do nightingales migrate to in winter?

Every autumn, nightingales leave their breeding grounds and fly to sub-Saharan Africa. They spend the winter months in a broad band stretching from West Africa eastward to the Great Rift Valley, living quietly in scrub and savanna. To get there, they cross the Sahara Desert, a journey of thousands of kilometres. Come spring, most individuals return to the very same patch of breeding habitat they used the previous year.

Are nightingales in decline?

Globally the species is listed as Least Concern by the IUCN, meaning it is not considered at risk of extinction. However, in countries like the United Kingdom and the Netherlands, populations have fallen sharply over recent decades. The main reason is the loss of dense scrubby undergrowth used for nesting. Deer browsing, changes in land management and shifts in climate have all reduced the availability of suitable habitat in these areas.

Where do nightingales build their nests?

The female builds the nest on her own, placing it very low in a dense shrub or directly on the ground among thick vegetation. She uses dead leaves, grass and fine plant fibres to construct a deep cup that blends almost perfectly into the surrounding leaf litter. This hidden location and the plain brown plumage of the sitting female make the nest extremely difficult to find, which offers strong protection against predators during incubation.

Nightingale

The common nightingale is a small, plain-looking bird dressed in warm brown above and pale buff below, with a distinctly rusty orange tail that it often cocks upward. What it lacks in colour it more than makes up for in voice. Males produce one of the most complex and powerful songs of any bird in the world, a torrent of whistles, trills, gurgles and slow fluting phrases that can carry through a still night for a considerable distance. The species breeds across southern and central Europe, the Middle East and parts of western Asia, nesting low in dense shrubs and thickets close to woodland edges. Each autumn it makes a long journey to sub-Saharan Africa, where it spends the winter months quietly foraging in scrub and savanna. Despite a wide range, populations in northern and western Europe have been falling steadily because of the loss of the dense undergrowth it depends on.

Habitat and distribution

Nightingales breed across a broad sweep of territory stretching from Portugal and Morocco in the west through southern and central Europe, the Middle East, and into parts of central Asia as far as Kyrgyzstan and Tajikistan. Within this range they favour dense, low vegetation: thickets of bramble and hawthorn, woodland edges with heavy undergrowth, and riverbank scrub where shade and cover are plentiful. They are not birds of open fields or high canopy. Come late summer, they leave their breeding grounds entirely and travel south to spend the winter in sub-Saharan Africa, from West Africa across to the Great Rift Valley. The journey covers thousands of kilometres and takes them across the Sahara Desert. They tend to return to the same breeding sites each spring.

Song

Few sounds in nature rival the song of a male nightingale. It is one of the most powerful and varied of any bird in the world, built from a wide repertoire of phrases that includes slow, deep fluting notes, rapid bubbling trills, sharp whistles and sudden crescendos. A single male may have over two hundred distinct song phrases, which he strings together without repeating the same sequence twice. Singing happens both day and night, but the night performances are the ones that capture most attention, carrying clearly through still air when other birds are silent. The song serves two purposes: it draws in females and warns rival males to keep their distance. Newly arrived males begin singing almost immediately after reaching their breeding grounds in April.

Diet

On their breeding grounds, nightingales feed mainly on invertebrates. Beetles, ants, flies, spiders and earthworms make up a large part of their daily intake, along with caterpillars and other small larvae found among leaf litter and low vegetation. They forage mostly on or near the ground, picking through fallen leaves and loose soil with quick, deliberate movements. Their cryptic brown plumage makes them easy to miss even when they are feeding in the open. As summer draws to a close and insects become less available, they shift toward soft fruits and berries to build up the fat reserves needed for their long journey south. Elderberries and other small fruits are particularly important during this period. On their wintering grounds in Africa they return largely to an insect diet.

Breeding

Nightingales arrive on their European breeding grounds between late April and early May. The nest is built by the female alone, placed low in a dense shrub or sometimes directly on the ground among thick vegetation. She constructs it from dead leaves, grass and fine plant fibres, creating a deep cup that blends into the surrounding leaf litter almost perfectly. A typical clutch contains four or five eggs, which she incubates for around thirteen to fourteen days. The male continues to sing throughout incubation but takes little part in sitting on the eggs. Once the chicks hatch, both parents bring food to the nest. The young leave after about eleven days, though they remain dependent on their parents for a short time before becoming fully independent.

Conservation

Globally, the nightingale is assessed by the IUCN as Least Concern, thanks to its wide range and large overall population. The picture is less reassuring in parts of Europe, particularly in the United Kingdom and the Netherlands, where numbers have dropped sharply over recent decades. The main driver is the loss of the dense, scrubby undergrowth the species depends on for nesting and shelter. Changes in how woodland and farmland are managed have reduced the availability of suitable habitat. Deer browsing, which strips away low shrub cover across large areas of woodland, has been identified as a particular problem in Britain. Climate shifts may also be affecting the timing of insect availability on the breeding grounds. Conservation efforts focus on restoring and maintaining thicket habitat, and on encouraging land management practices that allow dense undergrowth to regenerate.

Frequently Asked Questions

Why does the nightingale sing at night?

Male nightingales sing at night mainly to attract females and to signal their presence to rival males. Singing after dark has a practical advantage: the air is usually calmer and quieter, so the song travels farther. Newly arrived males in spring are particularly active at night because competition for mates is intense. The night song is so striking partly because no other bird is making noise at the same time, letting the nightingale's voice carry without competition.

How complex is a nightingale's song?

It is remarkably complex. A single male can master more than two hundred distinct song phrases, mixing whistles, deep fluting notes, rapid trills and sudden bursts of sound. He strings these phrases together in sequences that he rarely, if ever, repeats exactly. Scientists consider it one of the most varied and powerful songs produced by any bird on Earth. The song is entirely learned and refined over time, with older males generally having richer repertoires than younger ones.

What do nightingales eat?

On their breeding grounds, nightingales eat mainly insects and other invertebrates: beetles, ants, flies, spiders, earthworms and caterpillars are all regular prey. They forage close to or on the ground, working through leaf litter with careful, quick movements. Before migrating south in late summer, they switch to soft fruits and berries, such as elderberries, to build up the fat reserves needed for the long journey ahead. In Africa during winter, they return to feeding on insects.