Читать книгу A Manual of Philippine Birds - Richard C. McGregor - Страница 30

 a1. Breast without chestnut or rusty buff, heavily cross-barred with black. fasciata (p. 18)

 a2. Breast chestnut or rusty buff, without black cross-bars.b1. Larger; wing more than 80 mm.; breast rich chestnut; chin white (♂), or black (♀), or white spotted with black (young) ocellata (p. 20)b2. Smaller; wing less than 80 mm.; breast rusty buff; chin whitish, never black nor mixed with black.c1. Bill more slender, depth at angle of gonys, 4 mm. or less.d1. Smaller; wing, 57 to 60; tarsus, 16.5 to 18 mm whiteheadi (p. 20)d2. Larger; wing, 65.5 or more; tarsus, 19 mm. or more.e1. Larger; wing, 67 mm.; upper parts lighter suluensis (p. 21)e2. Smaller; wing, 65.5 mm.; upper parts darker celestinoi (p. 22)c2. Bill stouter, depth at angle of gonys, 5.8 mm worcesteri (p. 23)