How to identify the Loggerhead Shrike

To correctly identify the Loggerhead Shrike (Lanius ludovicianus), check each of these features. Birds can be tricky: habit, habitat, and call often confirm a sighting that a single photo cannot.

Size at a glance

Length

20-23 cm (7.9-9.1 in)

Wingspan

30-33 cm (12-13 in)

Weight

35-50 g (1.2-1.8 oz)

Physical features to check

1. 1

   Plumage

   Overall feather coloration and pattern.

   Adults have a gray head and back, white underparts, and black wings with a prominent white patch (visible in flight). The tail is black with white outer feathers. A distinct black mask extends from the bill through the eye to the ear coverts. The bill is dark gray, hooked at the tip. Juveniles are duller, with faint barring on the breast and flanks, and a less defined mask.

2. 2

   Beak shape

   Shape and color of the bill: a key field mark.

   Strong, dark gray, sharply hooked upper mandible with a tomial tooth (a notch on the cutting edge of the upper bill) for dismembering prey.

3. 3

   Eye color

   Iris color and any distinctive eye markings.

   Dark brown

4. 4

   Leg color

   Leg and foot color.

   Dark gray to black

5. 5

   Distinguishing features

   Standout features that separate this species.

   Black mask, hooked bill, gray back, white underparts, black wings with white patch, and a relatively long tail with white outer feathers.

6. 6

   Juvenile appearance

   How young birds differ from adults.

   Juveniles have a brownish-gray back, faint wavy barring on the breast and flanks, and a less distinct, often brownish-gray mask. Their plumage is generally duller and more mottled than adults.

7. 7

   Seasonal changes

   Plumage variation between breeding and non-breeding seasons.

   No significant seasonal plumage changes. Plumage remains consistent year-round, though wear and tear can make feathers appear duller before molting.

8. 8

   Sexual dimorphism

   How males and females differ.

   Males and females are generally similar in plumage, though females may be slightly duller with a less extensive black mask. Measurements are also very similar.

Key field marks

• Size and Shape. Medium-sized songbird, about the size of an American Robin, with a relatively large head, short neck, and a long tail. Appears somewhat stout-bodied.
• Plumage. Look for the distinctive gray back, white underparts, and black wings with a white patch. The black mask through the eye is a key identifier.
• Bill. Observe the strong, dark, hooked bill, characteristic of a predatory bird, even though it's a passerine.
• Perching Behavior. Often seen perched conspicuously on exposed branches, utility wires, or fence posts, scanning for prey.
• Hunting Behavior. Watch for its characteristic swooping flight to catch prey on the ground, and if lucky, observe its impaling behavior on thorns or barbed wire.
• Vocalizations. Listen for its varied song, which can be musical but also includes harsh, scratchy notes, and its distinctive 'shack-shack' call.

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