doing a nest exchange," explains Eva. Female #46-07 DAR is on
the nest, about to sit down. Her mate, #402, is feeding. Both
incubate the eggs, which take a month to hatch. Every 15-20 minutes
also do egg rolls, using their beaks to
turn the eggs over. Nest exchange times vary, but from what I
have seen, are conducted every couple hours or so."
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