From Amir Balaban we learned that the Desert Sparrow builds a large, hollow, round nest of sticks and twigs in which the female lay her eggs. The interior becomes a microclimate that keeps the eggs from becoming too warm under the hot Israeli sun, where temperatures can easily reach 50 degrees. The eggs now should not get warmer than the 38 degrees needed to develop the chicks - the adults do not even need to incubate them. Laurent Willenger had the good luck to observe the rare sparrows.
Written by Ranate Zöller
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