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Side-by-Side Comparison

Attribute	Riverside Wren	Eurasian Wren
Scientific Name	Cantorchilus semibadius	Troglodytes troglodytes
Order	Passeriformes	Passeriformes
Family	Troglodytidae	Troglodytidae
Conservation Status	Least Concern	Least Concern
Length	—	9.5 cm (3.7 in)
Wingspan	12.5 cm (4.9 in)	15.0 cm (5.9 in)
Weight	19.0 g (0.67 oz)	9.0 g (0.32 oz)
Diet	--	Insects and spiders, gleaned from dense vegetation, rock crevices, and bark. Active and restless forager.
Clutch Size	2	3-9
Population Trend	—	—

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Size Comparison

Body Length

Riverside Wren —

Eurasian Wren 9.5 cm

Wingspan

Riverside Wren 12.5 cm

Eurasian Wren 15.0 cm

Weight

Riverside Wren 19.0 g

Eurasian Wren 9.0 g

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Habitat Comparison

Shared Habitats

🌲 Forest

Riverside Wren only

None

Eurasian Wren only

🌿 Wetland

Eurasian Wren

Dense undergrowth in woodlands, gardens, hedgerows, and rocky areas. Prefers tangled vegetation close to the ground.

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Song & Call Comparison

Riverside Wren

Eurasian Wren

Song

Extraordinarily loud for its tiny size: a rapid, powerful stream of trills, buzzes, and churring phrases. One of Europe's loudest songs by volume relative to body weight.

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Geographic Range & Migration

Riverside Wren

Eurasian Wren

Eurasia from Iceland and western Europe to Japan. The only wren species found outside the Americas.

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Conservation Status

Least Concern

Riverside Wren

Least Concern

Eurasian Wren

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How to Tell Them Apart

Riverside Wren

Eurasian Wren

Plumage

Warm rufous-brown upperparts with fine dark barring. Pale buffy underparts with barred flanks. Short, often cocked tail.

Bill

Thin, slightly curved, dark brown bill

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About These Birds

Riverside Wren

Eurasian Wren

The Eurasian wren is one of the smallest birds in Europe but possesses an astonishingly loud song for its size. Males build multiple dome-shaped nests, from which the female selects one to line and use. In British folklore, the wren is known as the king of birds for outwitting the eagle in a flying contest.

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