How to identify the Dark-eyed Junco

To correctly identify the Dark-eyed Junco (Junco hyemalis), 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

13-16 cm (5.1-6.3 in)

Wingspan

18-25 cm (7.1-9.8 in)

Weight

18-30 g (0.6-1.1 oz)

Physical features to check

1. 1

   Plumage

   Overall feather coloration and pattern.

   Highly variable depending on subspecies. Common forms include: 'Slate-colored' (dark gray head, back, and flanks, white belly), 'Oregon' (dark hood, brown back and flanks, white belly), 'Pink-sided' (gray head and back, pinkish-brown flanks, white belly), 'White-winged' (dark gray with two prominent white wing bars), and 'Gray-headed' (gray head and back, rufous patch on back, white belly). All forms share a pale, conical bill and white outer tail feathers.

2. 2

   Beak shape

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

   Small, conical, finch-like bill, typically pale pinkish or yellowish.

3. 3

   Eye color

   Iris color and any distinctive eye markings.

   Dark brown, appearing black, giving the 'dark-eyed' moniker.

4. 4

   Leg color

   Leg and foot color.

   Pinkish-brown to flesh-colored.

5. 5

   Distinguishing features

   Standout features that separate this species.

   The most consistent and reliable field mark across all subspecies is the flash of white outer tail feathers, especially visible during flight or when hopping. The pale, conical bill is also characteristic.

6. 6

   Juvenile appearance

   How young birds differ from adults.

   Juveniles are streaky brown overall, resembling other sparrows, with a less distinct head pattern and often a yellowish bill. They lack the clean, adult plumage patterns and develop adult coloration after their first prebasic molt.

7. 7

   Seasonal changes

   Plumage variation between breeding and non-breeding seasons.

   No significant seasonal plumage changes. Plumage may appear slightly duller or worn by late summer before the prebasic molt, which restores fresh, vibrant colors.

8. 8

   Sexual dimorphism

   How males and females differ.

   Generally subtle. Males tend to be slightly darker and more boldly patterned than females, especially in the 'Slate-colored' and 'Oregon' forms. Females may have a duller, browner wash to their plumage.

Key field marks

• White Outer Tail Feathers. The most reliable field mark. Look for bright white feathers on the sides of the tail, especially when the bird flies or hops away.
• Plumage Pattern. Observe the overall color pattern. Is it uniformly dark gray (Slate-colored), hooded with brown flanks (Oregon), or gray with a rufous back (Gray-headed)? Note the contrast between the upperparts and the white belly.
• Bill Color. The pale, conical bill (pinkish or yellowish) is characteristic of Dark-eyed Juncos, distinguishing them from many other sparrows with darker bills.
• Behavior. Watch for their ground-foraging behavior, hopping and scratching in leaf litter. In winter, they are often seen in flocks at feeders or under shrubs.
• Vocalization. Listen for their simple, musical trill song during breeding season or their sharp 'smack' or 'chip' calls year-round.

Explore the Dark-eyed Junco