The European robin (Erithacus rubecula), known simply as the robin or robin redbreast in Great Britain and Ireland, is a small insectivorous passerine bird that belongs to the chat subfamily of the Old World flycatcher family. It is found across Europe, east to Western Siberia and south to North Africa; it is sedentary in most of its range except the far north.
It is about in length; the male and female are similar in colouration, with an orange breast and face lined with grey, brown upper-parts and a whitish belly.
Names
The distinctive orange breast of both sexes contributed to the European robin's original name of "redbreast", orange as a colour name being unknown in English until the 16th century, by which time the fruit had been introduced. The Dutch , French , Swedish rödhake, German , Italian , Spanish and Portuguese all refer to the distinctively coloured front.
In the 15th century, when it became popular to give human names to familiar species, the bird came to be known as robin redbreast, which was eventually shortened to robin. As a given name, Robin is originally a smaller form of the name Robert. The term robin is also applied to some birds in other families with red or orange breasts. These include the American robin (Turdus migratorius), a thrush, and the Australasian robins of the family Petroicidae, the relationships of which are unclear.
Other older English names for the bird include ruddock and robinet. In American literature of the late 19th century, this robin was frequently called the English robin.
Taxonomy and systematics
The European robin was described by Carl Linnaeus in 1758 in the 10th edition of his Systema Naturae under the binomial name Motacilla rubecula. Its specific epithet rubecula is a diminutive derived from the Latin , meaning 'red'. The genus Erithacus was introduced by French naturalist Georges Cuvier in 1800, giving the bird its current binomial name E. rubecula. The genus name Erithacus is from Ancient Greek and refers to an unknown bird, now usually identified as robin.
The genus Erithacus previously included the Japanese robin and the Ryukyu robin. These east Asian species were shown in molecular phylogenetic studies to be more similar to a group of other Asian species than to the European robin. In a reorganisation of the genera, the Japanese and the Ryukyu robins were moved to the resurrected genus Larvivora leaving the European robin as the sole member of Erithacus. The phylogenetic analysis placed Erithacus in the subfamily Erithacinae, which otherwise contained only African species, but its exact position with respect to the other genera was not resolved.
The genus Erithacus was formerly classified as a member of the thrush family (Turdidae) but is now considered to belong to the Old World flycatcher family (Muscicapidae), specifically to the chats (subfamily Saxicolinae) which also include the common nightingale.
Subspecies
In their large continental Eurasian range, robins vary somewhat, but do not form discrete populations that might be considered subspecies. Robin subspecies are mainly distinguished by forming resident populations on islands and in mountainous areas. The robin found in the British Isles and much of western Europe, Erithacus rubecula melophilus, occurs as a vagrant in adjacent regions. E. r. witherbyi from northwest Africa, Corsica, and Sardinia closely resembles melophilus but has shorter wings. The northeasternmost birds, large and fairly washed-out in colour, are E. r. tataricus. In the southeast of its range, E. r. valens of the Crimean Peninsula, E. r. caucasicus of the Caucasus and northern Transcaucasia, and E. r. hyrcanus southeastwards into Iran are generally accepted as significantly distinct.
On Madeira and the Azores, the local population has been described as E. r. microrhynchos, and although not distinct in morphology, its isolation seems to suggest the subspecies is valid (but see below).
Canary Islands robin
The most distinct birds are those of Gran Canaria (E. r. marionae) and Tenerife (E. r. superbus), which may be considered two distinct species or at least two different subspecies. They are readily distinguished by a white eye-ring, an intensely coloured breast, a grey line that separates the orange-red from the brown colouration, and the belly is entirely white.
Cytochrome b sequence data and vocalisations indicate that the Gran Canaria/Tenerife robins are indeed very distinct and probably derived from colonisation by mainland birds some 2 million years ago.