Читать книгу A Manual of Philippine Birds - Richard C. McGregor - Страница 40

Characters same as those given for the Order.

Families.

 a1. Soles very broad; tarsus stout, more or less feathered, and generally shorter than middle toe without claw.b1. Nostril coverings flat or but slightly swollen Treronidæ (p. 24)b2. Nostril coverings swollen forming a grape-seed shaped prominence on each side of culmen Columbidæ (p. 51)

 a2. Soles not greatly expanded on sides of toes; tarsus more slender, unfeathered, and longer than middle toe without claw Peristeridæ (p. 54)