Sharpe's lark, "M. (a.) sharpii", of northwestern Somalia, has almost plain, coppery red upper parts and is sometimes (e.g., by Sibley and Monroe) regarded as a separate and endangered species. Its small range of some 21,200 km2 is impacted by overgrazing and conversion to croplands. It may however be conspecific with Somali lark, "M. (a.) somalica", which differs by its very long bill and white edges to the outer tail feathers. The Somali lark is sometimes considered a race of rufous-naped lark, but is alternatively deemed a full species in "Mirafra" or "Certhilauda".