How to identify the Southern Grey-headed Sparrow

To correctly identify the Southern Grey-headed Sparrow (Passer diffusus), 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

15-16 cm

Wingspan

24-27 cm

Weight

20-30 g

Physical features to check

1. 1

   Plumage

   Overall feather coloration and pattern.

   Adults have a distinctive plain grey head, nape, and hindneck. The back and scapulars are rufous-brown, streaked with black. The rump and uppertail-coverts are plain grey-brown. The wings are dark brown with two indistinct pale wing-bars formed by pale tips to the median and greater coverts. The underparts are off-white to pale grey, becoming whiter on the belly. The tail is dark brown. There is a small, indistinct dark patch in front of the eye.

2. 2

   Beak shape

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

   Conical and stout, typical of seed-eating birds. Black in breeding adults, horn-colored in non-breeding adults and juveniles.

3. 3

   Eye color

   Iris color and any distinctive eye markings.

   Dark brown

4. 4

   Leg color

   Leg and foot color.

   Dark brown to blackish

5. 5

   Distinguishing features

   Standout features that separate this species.

   The plain grey head, contrasting with the rufous-brown back, is the most distinctive feature. Lack of a prominent supercilium or malar stripe. Relatively plain underparts.

6. 6

   Juvenile appearance

   How young birds differ from adults.

   Juveniles resemble adults but have a duller, browner grey head and nape, and the rufous on the back is less pronounced. The bill is horn-colored. They generally appear more muted overall.

7. 7

   Seasonal changes

   Plumage variation between breeding and non-breeding seasons.

   No significant seasonal plumage changes. The bill color changes from horn-colored in non-breeding birds to black in breeding birds.

8. 8

   Sexual dimorphism

   How males and females differ.

   Males and females are largely monomorphic in plumage, making them difficult to distinguish visually in the field. Males may have a slightly darker grey head and more intense rufous on the back, but this is not a reliable field mark.

Key field marks

• Head Color. Look for the uniformly plain grey head, nape, and hindneck. This is the most defining feature and distinguishes it from most other sparrows in its range.
• Back Plumage. Note the rufous-brown back with black streaking, which contrasts with the grey head.
• Underparts. Observe the plain, pale grey to off-white underparts, lacking any strong streaking or bib.
• Bill Color. In breeding season, the bill is black; outside of breeding, it's horn-colored. This can help indicate breeding readiness but not species identification.
• Vocalization. Listen for its characteristic cheerful, chattering 'chissip' or 'chirrup' calls and simple, repetitive song.

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