Locustella
Grass warblers

Trivial name	Latin name
Common Grasshopper-Warbler	Locustella naevia
Savi's Warbler	Locustella luscinioides
River warbler	Locustella fluviatilis
Middendorff's Grasshopper-Warbler	Locustella ochotensis

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comparison of wing and tail configuration¹

¹ According to Hartmann (2000a, 2000b and 2016)