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It was nest-building
time for weaver birds. The whole colony was in a state of high excitement,
making a continuous twittering din, with birds flying in trailing long grass
stems, leaving to get more grass, squabbling with neighbours, or constructing
the wonderfully intricate nests.
At any given moment, there would be a number of birds hanging underneath
the nest they were building, fluttering their wings, and turning this way
and that while staring at the nest intently. What internal plan were they
comparing it to? What wonderful mechanism of brain and vision enabled them
to construct their masterpieces?