The European robin (Erithacus rubecula), known simply as the robin or robin redbreast in the British Isles, is a small insectivorous passerine bird belonging to the Old World flycatcher family Muscicapidae.
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 diminutive 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 often referred to as 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 described 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 was formerly classified as a member of the thrush family (Turdidae) but is now known to belong to the Old World flycatcher family Muscicapidae. The genus formerly included the Japanese robin and the Ryukyu robin, but 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 extant member of Erithacus. A 2010 phylogenetic analysis placed Erithacus in a subfamily (Cossyphinae Vigors, 1825, syn. Erithacinae G. R. Gray, 1846) which otherwise contained only African species, but its exact position with respect to the other species in that subfamily was not resolved.
Subspecies
Within their extensive Eurasian range, robins exhibit some variation, though not enough to constitute distinct populations that could be classified as 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 E. r. 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.
Canary Islands robins
thumb|Adult and juvenile Gran Canaria robins
thumb|Tenerife robin Erithacus rubecula superbus, Los Silos, Tenerife
The most distinctive birds are found in 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. indicate that the Gran Canaria/Tenerife robins are indeed very distinct and probably derived from colonisation by mainland birds some 2 million years ago.