How to identify the Vermiculated Screech Owl

To correctly identify the Vermiculated Screech Owl (Megascops vermiculatus), 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

18-20 cm

Wingspan

45-50 cm

Weight

80-110 g

Physical features to check

1. 1

   Plumage

   Overall feather coloration and pattern.

   Overall grayish-brown to rufous-brown, heavily vermiculated and streaked with darker brown and black. The underparts are paler with fine barring and streaking. It has prominent ear tufts, which can be raised or lowered. The facial disc is indistinct, often bordered by a darker rim.

2. 2

   Beak shape

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

   Small, hooked, and dark gray to black.

3. 3

   Eye color

   Iris color and any distinctive eye markings.

   Yellow

4. 4

   Leg color

   Leg and foot color.

   Grayish-brown, feathered down to the toes.

5. 5

   Distinguishing features

   Standout features that separate this species.

   Fine vermiculations across the entire plumage, prominent ear tufts, yellow eyes, and a relatively indistinct facial disc. The overall pattern is very 'bark-like'.

6. 6

   Juvenile appearance

   How young birds differ from adults.

   Juveniles resemble adults but may have softer, fluffier plumage and less defined vermiculations. Their ear tufts may be less developed.

7. 7

   Seasonal changes

   Plumage variation between breeding and non-breeding seasons.

   No significant seasonal plumage changes.

8. 8

   Sexual dimorphism

   How males and females differ.

   Males and females are generally similar in plumage, with females often being slightly larger and heavier than males.

Key field marks

• Plumage Pattern. Look for the extremely fine, intricate vermiculations (worm-like markings) across the entire body, giving it a 'mossy' or 'bark-like' appearance. This is a key distinguishing feature from other screech owls.
• Eye Color. Bright yellow eyes are characteristic. Some other screech owls may have yellow eyes, but combined with the plumage, it helps.
• Ear Tufts. Observe the prominent ear tufts, which can be raised to appear more angular or flattened against the head. Their size and shape can be useful.
• Vocalizations. Listen for its distinctive soft, purring or rattling trill. This is often the most reliable way to identify it, especially at night.
• Size. Note its small size, typical of a screech owl, but pay attention to the overall proportions and head shape.

Explore the Vermiculated Screech Owl