Swallows nests small sparrow insectivorous birds fly fast acrobatic style
Swallows are small sparrow-sized insectivorous birds that fly fast in an acrobatic style. They have very unique behaviour of constructing their nests in buildings, bridges and cliff-sides in cup or gourd shapes from mud pellets which they collect in their beaks.
Being very social birds, they collect mud from the banks of ponds and ditches. These birds are not seen usually on the ground except for the collection of mud with the help of their beaks. They put the mud pellets one after the other, forming a cup- or gourd-shaped structure that narrows down to a hole for entrance after nearly a thousand trips. It is built just like a mason using brick after brick to construct a wall.
They also have the ability to construct colonies which consist of up to 1000 nests joined together very artistically. In case of a colony, each nest is built next to the other in a diligent manner that does not harm the other nests. At the end, the nest clusters up side by side to form an amazing colony accommodating hundreds of swallows. They are capable of identifying their very own nest in the colony consisting of hundreds of nests. They use straws and feathers to line the interior for laying eggs.