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 rufous back, while females are more cryptically colored. It is a long-distance migrant, breeding across much of Europe and western Asia and wintering in southern Africa.

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)

Caratteristiche fisiche

Piumaggio

Males have a grey crown and nape, a prominent black mask extending from the beak through the eye, a rufous-chestnut back, and pinkish-white underparts. The wings are dark brown with a small white patch at the primary bases (often concealed). The tail is black with white outer tail feathers. Females are duller, with a brownish-grey crown, a less distinct brownish mask, a rufous-brown back, and buffy-white underparts with fine crescent-shaped barring on the flanks and breast. Juveniles resemble females but are more heavily barred and mottled overall, with a scaly appearance on the back.

Forma del becco

Strong, hooked beak, dark grey to black, with a distinct tomial tooth on the upper mandible.

Colore degli occhi

Dark brown

Colore delle zampe

Dark grey to black

Caratteristiche distintive

Hooked beak, upright posture, long tail, and the male's distinctive grey head and rufous back. The black mask is a key feature for both sexes, though less prominent in females.

Aspetto giovanile

Juveniles are heavily barred and mottled brown on the upperparts and underparts, with a scaly pattern on the back. The mask is indistinct, and the overall coloration is much less vibrant than adults.

Cambiamenti stagionali

No significant seasonal plumage changes in adults; breeding and non-breeding plumages are essentially the same. Juveniles molt into first-winter plumage which resembles adult females.

Dimorfismo sessuale

Pronounced. Males are much more brightly colored with a grey head, black mask, and rufous back. Females are duller, browner overall, with a less distinct mask and barred underparts.

Come identificare

1. 1

   Male Plumage

   Look for the distinctive combination of a grey head, black mask, and rufous-chestnut back. Pinkish-white underparts are also characteristic.

2. 2

   Female Plumage

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

3. 3

   Juvenile Plumage

   Note the heavily barred and mottled brown appearance, especially the scaly pattern on the back and underparts.

4. 4

   Behavior

   Observe its 'butcher bird' behavior: perching prominently, scanning for prey, and the characteristic impaling of prey on thorns or barbed wire.

5. 5

   Beak Shape

   The strong, hooked beak with a distinct tomial tooth is a key shrike feature.

6. 6

   Habitat

   Search in open, scrubby habitats with scattered bushes and trees, often near agricultural fields or meadows.

Habitat e areale

Biomi

Temperate grasslands, shrublands, open woodlands, agricultural land

Areale geografico

Breeds across most of Europe (excluding the British Isles, Iceland, and parts of Scandinavia) and western Asia. Winters in southern Africa, primarily in the savanna and bushveld regions.

Fascia altitudinale

Typically found from sea level up to 2000 meters, occasionally higher in mountainous regions.

Ambienti preferiti

Prefers open, mosaic landscapes with scattered thorny bushes, hedges, scrub, and small trees, often near meadows or pastures. Requires suitable perches for hunting and thorny vegetation for impaling prey.

Comportamento

Periodo di attività

Diurnal

Abitudini alimentari

A predatory passerine, it primarily feeds on large insects (beetles, grasshoppers, crickets, dragonflies, bees, wasps), but also takes small vertebrates such as voles, shrews, lizards, frogs, and small birds. It hunts from an exposed perch, swooping down to catch prey on the ground or in flight. Known for its habit of impaling prey on thorns, barbed wire, or wedging it into crevices for later consumption or to aid in dismemberment.

Comportamento sociale

Generally solitary or found in pairs during the breeding season. Migrates in loose flocks, but not typically seen in large aggregations.

Tipo di volo

Direct and undulating flight, often low over the ground. When hunting, it performs short, agile flights from perches.

Migrazione

Long-distance migratory. Arrives on breeding grounds in April-May and departs for wintering grounds in August-September. The migration route is broad-front, often crossing the Mediterranean Sea and the Sahara Desert.

Territorialità

Highly territorial during the breeding season, with males defending their breeding territories through song and displays.

Riproduzione

Stagione riproduttiva

May to July, with peak activity in June.

Abitudini di nidificazione

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

Dimensione della covata

4-7 eggs, usually 5-6.

Descrizione dell'uovo

4-7 eggs, typically pale greenish-white or buff, heavily spotted and blotched with brown, grey, or olive, often forming a ring at the broad end. Eggs measure approximately 22 x 16 mm.

Periodo di incubazione

14-16 days, primarily by the female.

Periodo di involo

14-16 days after hatching. Young remain dependent on parents for some time after fledging.

Cure parentali

Both parents participate in feeding the nestlings and fledglings, though the female does most of the incubation.

Dove trovarlo

Consigli sul campo

1. Look for prominent perches. Red-backed Shrikes often perch conspicuously on the tops of bushes, small trees, fence posts, or power lines while scanning for prey.
2. Listen for their song. Their melodious, warbling song, often with mimicry, can draw attention to their presence, especially during the breeding season.
3. Observe hunting behavior. Watch for their characteristic swooping flights from a perch to catch insects on the ground, and look for 'larders' of impaled prey.
4. Visit during migration. During spring (April-May) and autumn (August-September) migration, they can be seen in a wider range of habitats as they pass through.
5. Use binoculars. Their relatively small size and often distant perches make binoculars essential for observing plumage details and behavior.

Specie simili

Fatti rapidi

Diet:

Large insects, small vertebrates

Migration:

Long-distance migrant to southern Africa

Nesting:

Cup-shaped nest in thorny bushes

Distinguishing Feature:

Male's grey head, black mask, rufous back

Behavior:

Impales prey on thorns ('butcher bird')

Curiosità

• The Red-backed Shrike is one of the few passerine birds that regularly preys on small vertebrates, showcasing its predatory nature.
• Its habit of impaling prey on thorns or barbed wire is not only for storage but also helps it tear apart larger prey items, as its feet are not strong enough to hold them.
• Despite its 'butcher bird' reputation, its song is surprisingly melodious and often includes imitations of other bird species.
• The species has experienced significant declines in some parts of its European range, particularly in Western Europe, due to habitat loss and changes in agricultural practices.

Classificazione scientifica

Regno

Animalia

Phylum

Chordata

Classe

Aves

Ordine

Passeriformes

Famiglia

Laniidae

Genere

Lanius

Specie

Lanius collurio

Esplora Red-backed Shrike