Читать книгу A Manual of Philippine Birds - Richard C. McGregor - Страница 274

 a1. Tail-feathers twenty or more, the outer ones stiffened and very narrow; dark bars on axillars wider than the white bars.b1. Tail shorter, about 48 mm.; outer feathers narrower. stenura (p. 144)b2. Tail longer, about 53 mm.; outer feathers wider. megala (p. 145)

 a2. Tail-feathers usually fourteen in number, neither excessively stiff nor narrow; dark bars on axillars narrow or obsolete. gallinago (p. 146)