The Semi-collared Flycatcher , Ficedula semitorquata, is a small passerine

Passerine

A passerine is a bird of the order Passeriformes, which includes more than half of all bird species. Sometimes known as perching birds or, less accurately, as songbirds, the passerines form one of the most diverse terrestrial vertebrate orders: with over 5,000 identified species, it has roughly...

 bird in the Old World flycatcher

Old World flycatcher

The Old World flycatcher family Muscicapidae is a large family of small passerine birds mostly restricted to the Old World. These are mainly small arboreal insectivores, many of which, as the name implies, take their prey on the wing.-Characteristics:...

 family, one of the four species of Western Palearctic black-and-white flycatchers

Western Palearctic black-and-white flycatchers

The term Western Palearctic black-and-white flycatchers is used to refer to a group of similar-looking birds in the genus Ficedula:* Atlas Flycatcher F. speculigera which breeds in Northwest Africa...

. It breeds in the southeastern corner of Europe

Europe

Europe is, by convention, one of the world's seven continents. Comprising the westernmost peninsula of Eurasia, Europe is generally 'divided' from Asia to its east by the watershed divides of the Ural and Caucasus Mountains, the Ural River, the Caspian and Black Seas, and the waterways connecting...

, the Middle East

Middle East

The Middle East is a region that encompasses Western Asia and Northern Africa. It is often used as a synonym for Near East, in opposition to Far East...

 and southwestern Asia

Asia

Asia is the world's largest and most populous continent, located primarily in the eastern and northern hemispheres. It covers 8.7% of the Earth's total surface area and with approximately 3.879 billion people, it hosts 60% of the world's current human population...

. It is migratory

Bird migration

Bird migration is the regular seasonal journey undertaken by many species of birds. Bird movements include those made in response to changes in food availability, habitat or weather. Sometimes, journeys are not termed "true migration" because they are irregular or in only one direction...

, wintering in Africa

Africa

Africa is the world's second largest and second most populous continent, after Asia. At about 30.2 million km² including adjacent islands, it covers 6% of the Earth's total surface area and 20.4% of the total land area...

. It is a rare vagrant in western Europe.

This is a 12-13.5 cm long bird, intermediate in appearance between Collared Flycatcher

Collared Flycatcher

The Collared Flycatcher, Ficedula albicollis, is a small passerine bird in the Old World flycatcher family, one of the four species of Western Palearctic black-and-white flycatchers. It breeds in southeast Europe and southwest Asia and is migratory, wintering in sub Sahara Africa...

 and European Pied Flycatcher

European Pied Flycatcher

The Pied Flycatcher, Ficedula hypoleuca, is a small passerine bird in the Old World flycatcher family, one of the four species of Western Palearctic black-and-white flycatchers. It breeds in most of Europe and western Asia. It is migratory, wintering mainly in western Africa. It hybridizes with...

. It has often been classed as a subspecies of Collared Flycatcher.

The breeding male is mainly black above and white below, with a white half-collar, extending further back than in Pied, large white wing patch, extensively white tail sides and a large white forehead patch. It has a pale grey rump. The bill is black and has the broad but pointed shape typical of aerial insectivores. It mainly takes insects in flight, rarely hunting caterpillar

Caterpillar

Caterpillars are the larval form of members of the order Lepidoptera . They are mostly herbivorous in food habit, although some species are insectivorous. Caterpillars are voracious feeders and many of them are considered to be pests in agriculture...

s amongst the tree foliage like Pied Flycatcher.

Non-breeding male, females and juvenile Semi-collared Flycatchers have the black replaced by a pale brown, and may be very difficult to distinguish from other Fidecula flycatchers, particularly the Collared Flycatcher. A distinction is that Semi-collared may show a white second wing bar, but many individuals are not separable in the field.

Semi-collared Flycatchers are birds of belts of deciduous woodlands, especially Oak

Oak

An oak is a tree or shrub in the genus Quercus , of which about 600 species exist. "Oak" may also appear in the names of species in related genera, notably Lithocarpus...

 and Hornbeam

Hornbeam

Hornbeams are relatively small hardwood trees in the genus Carpinus . Though some botanists grouped them with the hazels and hop-hornbeams in a segregate family, Corylaceae, modern botanists place the hornbeams in the birch subfamily Coryloideae...

, in mountainous areas. They build an open nest in a tree hole, and 4-7 eggs are laid. The song is again intermediate between Collared and Pied Flycatchers, with slow strained whistles, but some rhythmic elements.