Red-backed Shrike

Informazioni

The Red-backed Shrike is a medium-sized passerine bird known for its predatory habits, often impaling prey on thorns or barbed wire, earning it the nickname 'butcher bird'. It exhibits distinct sexual dimorphism, with males displaying a striking grey head and reddish-brown back.

Dimensioni e longevità

Lunghezza

16-18 cm

Apertura alare

24-27 cm

Peso

25-35 g

Longevità

Up to 8 years in the wild

Dieta

Carnivore (primarily insectivore, but also small vertebrates)

Caratteristiche fisiche

Piumaggio

Adult male: Ash-grey crown and nape, black mask through the eye, reddish-brown mantle and back, pinkish-white underparts. Wings are dark brown with a white patch at the primary bases (often visible in flight). Tail is black with white outer tail feathers. Adult female: Duller overall, with a brownish-grey crown and nape, less distinct brownish mask, rufous-brown back, and buffy-white underparts with fine crescent-shaped barring. Juvenile: Heavily barred brownish plumage, resembling a duller female but with more extensive barring on the upperparts and underparts.

Forma del becco

Strong, hooked bill, dark grey to black, with a paler base to the lower mandible.

Colore degli occhi

Dark brown.

Colore delle zampe

Dark grey to black.

Caratteristiche distintive

Hooked bill, upright posture, habit of perching conspicuously on elevated points, and the male's distinctive grey head and reddish back. The black mask is prominent in males.

Aspetto giovanile

Heavily barred brown plumage on both upperparts and underparts, with a scaly appearance. Lacks the distinct grey head and reddish back of the adult male, and the mask is very faint or absent.

Cambiamenti stagionali

No significant seasonal plumage changes in adults, though plumage may appear slightly worn by late summer. Juveniles molt into first-winter plumage, which resembles a duller adult female, before acquiring adult plumage in their second year.

Dimorfismo sessuale

Pronounced. Males have a grey head, black mask, and reddish-brown back. Females are duller, browner, with a less distinct mask and barred underparts.

Come identificare

1. 1

   Male Plumage

   Look for the distinctive combination of an ash-grey head, prominent black eye-mask, and a rich reddish-brown back. Underparts are pinkish-white.

2. 2

   Female Plumage

   Identify by the duller brownish-grey head, less distinct brownish mask, rufous-brown back, and characteristic crescent-shaped barring on the buffy-white underparts.

3. 3

   Juvenile Plumage

   Note the heavily barred brown plumage on both upperparts and underparts, giving a scaly appearance. The mask is very faint or absent.

4. 4

   Perching Behavior

   Observe its habit of perching conspicuously on elevated points like isolated bushes, fence posts, power lines, or tall weeds, from which it scans for prey.

5. 5

   Hunting Style

   Watch for its characteristic swooping flight from a perch to catch prey on the ground, and its 'butcher bird' habit of impaling prey.

6. 6

   Bill Shape

   Note the strong, hooked bill, typical of shrikes, used for tearing prey.

Habitat e areale

Biomi

Temperate grasslands, shrublands, open woodlands, agricultural areas.

Areale geografico

Breeds across most of Europe and western Asia. Winters in southern Africa.

Fascia altitudinale

Typically found from sea level up to 2,000 meters, occasionally higher in mountainous regions.

Ambienti preferiti

Open country with scattered thorny bushes, hedges, scrub, young plantations, clearings in forests, and orchards. Requires suitable perches for hunting and dense thorny vegetation for nesting and impaling prey.

Comportamento

Periodo di attività

Diurnal.

Abitudini alimentari

Predatory. Hunts from a prominent perch, swooping down to catch large insects (beetles, grasshoppers, crickets, bees, wasps), small mammals (voles, shrews), small birds, and reptiles. Known for its habit of impaling prey on thorns, barbed wire, or wedging it into crevices for later consumption or to tear it apart.

Comportamento sociale

Solitary or found in pairs during the breeding season. Highly territorial. Migrates in small, loose flocks or individually.

Tipo di volo

Direct and undulating flight, often low over the ground, with rapid wing beats interspersed with glides. Can hover briefly when hunting.

Migrazione

Long-distance migratory. Breeds in Europe and Asia, migrating south to winter in southern Africa (from Kenya south to South Africa). Migration occurs in autumn (August-October) and spring (April-May).

Territorialità

Highly territorial during the breeding season, with males defending their breeding grounds and hunting territories vigorously against rivals.

Riproduzione

Stagione riproduttiva

May to July in Europe.

Abitudini di nidificazione

Nests are typically built in dense, thorny bushes or small trees, often 1-3 meters above the ground. The nest is a bulky cup made of twigs, roots, moss, and grass, lined with finer materials like hair, wool, and feathers.

Dimensione della covata

Typically 4-7 eggs, usually one brood per year.

Descrizione dell'uovo

4-7 eggs, typically pale greenish-white or buff, heavily spotted and blotched with brown, grey, or reddish-brown, often concentrated at the broad end.

Periodo di incubazione

14-16 days, primarily by the female.

Periodo di involo

14-16 days after hatching. Young are fed by both parents.

Cure parentali

Both parents participate in feeding the nestlings and fledglings. The male often brings food to the female during incubation.

Dove trovarlo

Consigli sul campo

1. Scan Prominent Perches. Red-backed Shrikes are often easily spotted as they prefer to perch on the highest point of a bush, fence post, or wire, making them quite visible.
2. Listen for Calls. While their song can be quiet, their harsh 'chek' or 'churr' calls can draw attention, especially during the breeding season.
3. Look for 'Larders'. Keep an eye out for their 'larders' – thorns or barbed wire with impaled insects or small vertebrates, which is a strong indicator of their presence.
4. Observe Hunting Behavior. Watch for their characteristic hunting style: a sudden dive from a perch to catch prey on the ground.
5. Timing. Best observed during the breeding season (May-July) in their European and Asian breeding grounds, or during migration periods (April-May, August-October) in stopover sites.

Specie simili

Fatti rapidi

Nickname:

Butcher Bird

Prey Storage:

Impales prey on thorns or barbed wire

Migration Distance:

Long-distance migrant to southern Africa

Sexual Dimorphism:

Strongly present

Habitat Preference:

Open country with thorny scrub

Curiosità

• The Red-backed Shrike's scientific name 'Lanius collurio' comes from Latin, where 'Lanius' means 'butcher' and 'collurio' refers to a shrike.
• Their habit of impaling prey is not just for storage; it also helps them dismember larger prey items that are too big to hold in their feet, as shrikes lack strong talons.
• Despite their predatory nature, their song is surprisingly melodious and often includes mimicry of other bird species.
• The species has experienced significant declines in parts of its European range due to habitat loss and changes in agricultural practices, though it remains widespread globally.

Classificazione scientifica

Regno

Animalia

Phylum

Chordata

Classe

Aves

Ordine

Passeriformes

Famiglia

Laniidae

Genere

Lanius

Specie

Lanius collurio

Esplora Red-backed Shrike