Common Reed Warbler vs River Warbler

In short

The Common Reed Warbler and River Warbler can be distinguished by their structure and habitat preferences. The Common Reed Warbler is slimmer with a more uniform plumage and prefers reed beds, while the River Warbler is bulkier with a streaked underpart and favors dense, low vegetation.

Identification tips

• Structure: The Common Reed Warbler is slimmer with a more uniform appearance, while the River Warbler is bulkier with a longer undertail and streaked underparts.
• Habitat: Look for the Common Reed Warbler in reed beds and marshes, and the River Warbler in dense, low vegetation.
• Vocalization: Listen for the River Warbler's distinctive insect-like song, which can be a key differentiator.

Size

Both species are similar in size, around 14 cm in length.

Plumage

The Common Reed Warbler has a more uniform brown plumage with a less distinct supercilium, whereas the River Warbler has a dark olive-brown back, broad dark streaks on the underparts, and a poorly marked buffish supercilium.

Behaviour

The River Warbler often creeps among low vegetation or runs on the ground, while the Common Reed Warbler is more often seen in reed beds.

Habitat

Common Reed Warbler is typically found in marshy habitats with reeds and sedges, whereas the River Warbler prefers dense, low vegetation and grassy areas.

Voice

The Common Reed Warbler's song is not detailed here, but the River Warbler has a distinctive high-pitched, throbbing, insect-like song: 'dzi-dzi-dzi-dzi-dzi-dzi…'.