It is similar to female Sardinian and Subalpine Warblers but has plainer tertial feathers and more contrast between the pale back and dark tail.
This in turn is related to the species of Mediterranean and Middle East Sylvia warblers that have a naked eye-ring, namely the Subalpine Warbler, Sardinian Warbler and Ménétries's Warbler.
Immature birds can be confused with both the Whitethroat and the Subalpine Warbler, and identification is difficult in the field.
Old World warbler | Cetti's Warbler | Warbler | Wood Warbler | warbler | New World warbler | Subalpine Warbler | Great Reed Warbler | Garden Warbler | Sedge Warbler | golden-cheeked warbler | Cerulean Warbler | wood warbler | Wilson's Warbler | Willow Warbler | willow warbler | Whistler's Warbler | Typical warbler | Swainson's Warbler | Seychelles Warbler | sedge warbler | Rubeho Warbler | River Warbler | Prothonotary Warbler | prothonotary warbler | Orphean Warbler | Orange-crowned Warbler | Ménétries's Warbler | Japanese Bush Warbler | Hatutu Marquesan Warbler |