The Marsh Wren is a small, plump, round-bodied wren with a short tail that it often holds up almost vertically above its back. It has a thin bill and short wings.
About the size of a House Wren, but smaller than a Song Sparrow.sparrow-sized or smaller
- Both Sexes
- Length: 3.9-5.5 in (10-14 cm)
- Weight: 0.3-0.5 oz (9-14 g)
- Wingspan: 5.9 in (15 cm)