Sedge Warbler vs Marsh Warbler

In short

The Sedge Warbler and Marsh Warbler can be tricky to distinguish, but key differences include the Sedge Warbler's bold supercilium and the Marsh Warbler's longer primary projection. Vocalizations also differ significantly, with the Marsh Warbler known for its mimicry.

Identification tips

1. Look for the bold white supercilium on the Sedge Warbler. 2. Check the primary projection: Marsh Warblers have longer primaries. 3. Listen for song differences: Sedge Warblers chatter, Marsh Warblers mimic. 4. Consider habitat: Sedge Warblers in reeds, Marsh Warblers in mixed vegetation.

Size

Both species are similar in size, typical of small warblers.

Plumage

The Sedge Warbler has a distinctive, bold white supercilium that contrasts with its streaked crown, while the Marsh Warbler has a more subdued appearance with a less prominent supercilium and no crown streaking.

Behaviour

Both species exhibit similar behaviors, often seen skulking in dense vegetation, but the Marsh Warbler is more likely to be found in taller, rank vegetation.

Habitat

Sedge Warblers prefer reed beds and wetland edges, while Marsh Warblers are found in habitats with a mix of small trees, bushes, and tall herbaceous vegetation.

Voice

The Sedge Warbler has a fast, chattering song, whereas the Marsh Warbler is noted for its complex song that includes mimicry of other bird species.