This bird is extraordinary. I was awed by their intelligence. Every year they came here to make nests. Last year the acacia trees in vacant plots in our area were uprooted due to heavy rains and construction activity. I thought this year they will not come here because there seems to be no trees for hanging the nests.
What is the Criteria for selection of a site?
Suitable tree which is not easily approachable by predators and humans.
Food and Water Availability
Yet some 10-15 days ago, I noticed these birds in bullrushes collecting the nesting material. I was very much surprised where they are making the nests. And see they selected the Palm trees in a society for three reasons: One they cut the nesting material from palm fronds and second that nearby on the sides of the road, people come with grain seeds for ants and sparrows. So food will be nearby.
All birds make nests to raise their chicks. The nests range from simple twigs heaped together to most elaborate. Weaver birds excel as craftsman in making intricate nests.
The area they choose for nesting is carefully chosen. There should be thorny tree like acacia or lofty trees like palms. Idea is to deter predators like snakes, shikra etc from destroying the nest for eggs. Then there should be plenty of food available near by. So they choose the areas near agricultural land. Then there should be nesting material available like bulrush grass in bogs.
While baya weavers make the nests on trees their cousins Black Breasted Weavers also known as Bengal Weaver or Black Throated Weaver (Ploceus benghalensis) make their nests inside thick bulrush grasses. Their nests are not easily seen on cursory look. It is so intricately hidden.
Only male birds do the nest making. They make hundreds of trips to bring the grass blades which they cleave from the grass stalks. Females are invited to inspect the partially completed nest, if a female okays the nest she would move with male for starting the family.
In our area there are plenty of weavers birds. We located one such nest in the making. From a distance without disturbing the bird made a video which I am sharing with my friends on wordpress.