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Although some birds are truly nocturnal, many of the birds that we commonly describe as such are actually crepuscular meaning they are active during twilight. Even owls, which are probably the most famous of all nocturnal birds, may be active during the day. Other birds are diurnal but exhibit some nocturnal behaviour such as singing.

Nocturnal birds tend to have highly camouflaged plumage, large eyes, heightened senses and during the day can appear tame. However, this is a defence mechanism as they will automatically freeze and remain motionless if disturbed during daylight.
1. Barn Owl

Like most owls, the barn owl (Tyto alba) is nocturnal across most of its range although in the UK it sometimes hunts during the day.

Barn Owl At Night

Barn owls have an acute sense of hearing; its heart shaped face collects sound in the same way as human ears and it uses this heightened sense of hearing to target its prey and dive to the ground using its long talons to seize small mammals. Barn owls do not require sight to find prey and can even find small animals that are hidden underneath snow.
2. Little Penguin

Little penguins (Eudyptula minor), sometimes known as fairy penguins, are the smallest species of penguin standing just 33 cm tall. They are found on the coastlines of southern Australia and New Zealand and are famous for the nightly parade they made on Phillip Island.

Little Penguins

Although little penguins are diurnal they exhibit some nocturnal behaviour on land mating, protecting their nests and feeding their chicks. They will spend the day out at sea searching for food sometimes staying on the water for a number of days.
3. Black-Crowned Night Heron

The black-crowned night heron (Nycticorax nycticorax) is a stocky bird with shorter legs and neck than its more familiar cousins, the day herons.

Black-Crowned Night Heron

The genus name derives from the Greek for “night raven” as they are largely nocturnal, ambushing prey from the water’s edge during the night and early morning and resting in trees and bushes during the day.
4. Nightjar

Nightjars (Caprimulgus europaeus) are crepuscular and nocturnal, and during the day will spend most of their time resting on the ground. Their cryptic plumage means they can be well camouflaged and difficult to spot.

Nightjar

At dusk and dawn nightjars can be seen foraging for food, flying over open countryside searching for moths and insects. Their flight is virtually silent and they have a mythical ability to steal milk from goats and has the nickname goatsucker. Indeed its scientific name derives from the Latin for "goat" (caper) and "to milk" (mulego).
5. Stone-Curlew

Sometimes known as thick-knees, stone-curlews (Burins oedicnemus) are active at night using their large yellow, reptile-like eyes to search for food in the dark.

Stone-Curlew

Despite the name, stone curlews are not related to Eurasian curlews, but get their name from their loud, wailing curlew-like call. Stone-curlews are rare visitors to the UK, arriving in March and departing in October. The best place to see them is at Weeting Heath in Norfolk.
6. Kakapo

Endemic to New Zealand, not only are kakapos (Strigops habroptilus) nocturnal, they are flightless and ground-dwelling and are the only parrot to have a lek breeding system.

Kakapo

During the day kakapos roost under the cover of trees and at night they search for food including plants, seeds, fruit and sapwood. Kakapo is a Maori word meaning night parrot although it is not related to the night parrot of Australia.
7. Woodcock

Woodcocks (Scolopax rusticola) are largely nocturnal spending most of the day resting in dense vegetation. They are large wading birds with long straight bills.

Woodcock

The woodcock can be difficult to spot due to its plumage which provides an almost perfect camouflage when hiding in leaf litter. They are most active at dawn and dusk searching for worms, snails, spiders and caterpillars.
8. Tawny Frogmouth

A species of frogmouth native to Australia, tawny frogmouths (Podargus strigoides) are sometimes mistaken for owls due to their nocturnal habits and similar appearance.

Tawny Frogmouth

During the day they do not actively look for food, but they may sit at rest with their mouths open snapping it shut if an insect enters. Otherwise their diet consists of nocturnal insects such as moths, slugs, snails and worms.
9. Nightingale

Nightingales (Luscinia megarhynchos) are not the only birds to sing at night but they are probably the most famous, particularly the one that sang in Berkeley Square.

Nightingale

Only unpaired male nightingales sing regularly during the night to attract a mate and in cities and towns they will sing more loudly to be heard over background noise. The singing of a nightingale can sometimes trigger other birds to join in particularly robins which are in fact the most common nighttime singers in UK towns and gardens.
10. Corncrake

Corncrakes (Crex crex) are related to moorhens, coots and water rails but live on dry land. They are secretive birds with a rasping call.

Corncrake

Corncrakes spend much of the day hidden in vegetation on farmland but have a loud nocturnal call that sometimes led to disturbed sleep for people who lived near rural areas. In John Clare’s poem The Landrail (an alternative name for the corncrake), he writes about the difficulty of seeing corncrakes as opposed to hearing them.

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