Het Leven der Dieren: Deel 2, Hoofdstuk 05: De Ralvogels; Hoofdstuk 06: De Kraanvogels

The text surveys rail-like waterbirds, presenting their classification into several families and two main groups while describing shared morphology such as medium bills, short wings and tails, long toes and a well-developed hind toe. It covers habitat and behavior—marsh and reedbed dwelling, feeding on small aquatic animals and plant matter, reed nests with precocial young—and notes differences in locomotion, swimming and diving ability, and the loss of flight in some island forms. Subfamilies are contrasted (coots with frontal shields and lobed toes versus true rails), and territoriality, parental care, predation risks, human use and captive maintenance are examined, with representative species profiles included.