Читать книгу A Manual of Philippine Birds - Richard C. McGregor - Страница 211

 a1. Larger; wing more than 165 mm.; upper parts much spotted.b1. A minute hind toe; axillars sooty black. Squatarola (p. 103)b2. No hind toe; axillars gray or white. Charadrius (p. 104)

 a2. Smaller; wing less than 165 mm.; upper parts nearly uniform gray or brown.b1. Larger; wing, 140 to 165 mm.; bill stouter. Ochthodromus (p. 105)b2. Smaller; wing, 100 to 115 mm.; bill more slender. Ægialitis (p. 109)