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OstrichInsight on the Scriptures, Volume 2
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Again in contrast to the stork, which builds its big nest firmly in the tops of trees (Ps 104:17), buildings, or tall rocks, the ostrich merely scoops out a shallow depression in the ground surrounded by a low embankment. Here the female lays the eggs, weighing some 1.5 kg (3 lb) each, and since the ostrich is often polygamous (unlike the stork, which is renowned for its fidelity to one mate), there may be a good number of eggs laid in the nest by the two or three hens. The male ostrich warms the nest eggs during the night and the hen incubates them by day, but she is known to leave the nest for periods during the day when the sun is hot.
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