Shrike

Shrikes (/ʃraɪk/) are carnivorous passerine birds of the family Laniidae. The family is composed of 33 species in four genera.

For other uses, see Shrike (disambiguation).

Shrikes
Red-backed shrike (Lanius collurio)
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Passeriformes
Superfamily: Corvoidea
Family: Laniidae
Rafinesque, 1815
Genera

The family name, and that of the largest genus, Lanius, is derived from the Latin word for "butcher", and some shrikes are also known as butcherbirds because of their feeding habits.[1] The common English name shrike is from Old English scrīc, alluding to the shrike's shriek-like call.[2]

Distribution, migration, and habitat

Most shrike species have a Eurasian and African distribution, with just two breeding in North America (the loggerhead and great grey shrikes). No members of this family occur in South America or Australia, although one species reaches New Guinea. The shrikes vary in the extent of their ranges, with some species such as the great grey shrike ranging across the Northern Hemisphere to the Newton's fiscal which is restricted to the island of São Tomé.[3]

They inhabit open habitats, especially steppe and savannah. A few species of shrikes are forest dwellers, seldom occurring in open habitats. Some species breed in northern latitudes during the summer, then migrate to warmer climes for the winter.

Description

Shrikes are medium-sized birds with grey, brown, or black and white plumage. Most species are between 16 cm (6.3 in) and 25 cm (9.8 in) in size, however, the genus Corvinella with its extremely elongated tail feathers may reach up to 50 cm (20 in) in length. Their beaks are hooked, like those of a bird of prey, reflecting their predatory nature, and their calls are strident.

Behaviour
A bee presumably caught and impaled by a shrike

Shrikes are known for their habit of catching insects and small vertebrates and impaling their bodies on thorns, the spikes on barbed-wire fences, or any available sharp point. This helps them to tear the flesh into smaller, more conveniently sized fragments, and serves as a cache so that the shrike can return to the uneaten portions at a later time.[4] This same behaviour of impaling insects serves as an adaptation to eating the toxic lubber grasshopper, Romalea microptera. The bird waits for 1–2 days for the toxins within the grasshopper to degrade, when they can then eat it.[5]

Shrikes are territorial, and these territories are defended from other pairs. In migratory species, a breeding territory is defended in the breeding grounds and a smaller feeding territory is established during migration and in the wintering grounds.[3] Where several species of shrikes exist together, competition for territories can be intense.

Shrikes make regular use of exposed perch sites, where they adopt a conspicuous upright stance. These sites are used to watch for prey and to advertise their presence to rivals.

Breeding

Shrikes are generally monogamous breeders, although polygyny has been recorded in some species.[3] Co-operative breeding, where younger birds help their parents raise the next generation of young, has been recorded in both species in the genera Eurocephalus and Corvinella, as well as one species of Lanius. Males attract females to their territory with well-stocked caches, which may include inedible but brightly coloured items. During courtship, the male performs a ritualised dance which includes actions that mimic the skewering of prey on thorns, and feeds the female. Shrikes make simple, cup-shaped nests from twigs and grasses, in bushes and the lower branches of trees.[4]

Species in taxonomic order
Lizard impaled on thorns by a southern grey shrike, Lanius meridionalis, Lanzarote

The family Laniidae was introduced (as Lanidia) by the French polymath Constantine Samuel Rafinesque in 1815.[6][7]

FAMILY: LANIIDAE[8]

Birds with similar names

Other species with names including the word shrike, due to perceived similarities in morphology, are in the families:


The helmetshrikes and bushshrikes were formerly included in Laniidae, but they are now known to be not particularly closely related to true shrikes.

The Australasian butcherbirds are not shrikes, although they occupy a similar ecological niche.

References
  1. Jobling, James A (2010). The Helm Dictionary of Scientific Bird Names. London: Christopher Helm. p. 219. ISBN 978-1-4081-2501-4.
  2. "Shrike". Oxford English Dictionary (3rd ed.). Oxford University Press. September 2005. (Subscription or UK public library membership required.)
  3. Yosef, Reuven (2008). "Family Laniidae (Shrikes)". In Josep, del Hoyo; Andrew, Elliott; David, Christie (eds.). Handbook of the Birds of the World. Volume 13, Penduline-tits to Shrikes. Barcelona: Lynx Edicions. pp. 732–773. ISBN 978-84-96553-45-3.
  4. Clancey, P.A. (1991). Forshaw, Joseph (ed.). Encyclopaedia of Animals: Birds. London: Merehurst Press. p. 180. ISBN 1-85391-186-0.
  5. Yosef, Reuven; Whitman, Douglas W. (1992). "Predator exaptations and defensive adaptations in evolutionary balance: No defence is perfect". Evolutionary Ecology. 6 (6): 527–536. doi:10.1007/BF02270696.
  6. Rafinesque, Constantine Samuel (1815). Analyse de la nature ou, Tableau de l'univers et des corps organisés (in French). Palermo: Self-published. p. 67.
  7. Bock, Walter J. (1994). History and Nomenclature of Avian Family-Group Names. Bulletin of the American Museum of Natural History. Number 222. New York: American Museum of Natural History. pp. 150, 252.
  8. Gill, Frank; Donsker, David, eds. (2019). "Shrikes, vireos & shrike-babblers". World Bird List Version 9.2. International Ornithologists' Union. Retrieved 14 August 2019.

Further reading
  • Fuchs, J.; Alström, P.; Yosef, R.; Olsson, U. (2019). "Miocene diversification of an open‐habitat predatorial passerine radiation, the shrikes (Aves: Passeriformes: Laniidae)". Zoologica Scripta: 1–18. doi:10.1111/zsc.12363.
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