Baya Weaver Birds
The bird,” Baya weavers” are highly gregarious, sparrow sized and popularly known for excellent nest-weaving skills, these birds have been residents of India for a long time. Among four species of weaver birds, the Baya weaver is one of the most familiar and common birds in the country.
The nest of the weaverbird is constructed by the male, using strands of grass carefully wound together in an intricate web. Once complete the female will inspect it to see whether she deems it satisfactory to raise her future chicks.

Puffer Fishes’ Sandcastles
A tiny Japanese puffer fish creates a grand sand sculpture on the featureless seabed by using his fins to dig furrows. He uses this to attract the attention of passing females.
Puffer fish are fantastic creatures in themselves. Scientists have discovered 120 species and their most famous attribute is to be able to ‘puff’ themselves up like a balloon when attacked, co-incidentally erecting sharp spines embedded in their skin. This has the effect of making them appear too large for the predator to eat and completely unpalatable given the covering of spines.

Caddisfly Larvae’ Motor House
A more modest example of architecture, but no less significant is the protective shell built by the caddis fly larvae. The larvae live in water and construct their shell out of small pebbles, shells or pieces of plant which are then held together with silk threads that the larvae expel from spinnerets in their heads. This protective casing is then carried around with them and can be retreated into at the first sign of danger.

Mound-building Termites’ Skyscrapers
Termite can build anywhere there is grass and water. The mounds they build can be 9 meter high. But they choose instead to build their nests in the ground below the mound. In fact, they only travel into the mounds to repair them and defend the city below from invading ant armies and other threats.
There’s a lot of hustle and bustle in the termite nest, and both the fungi and the termites produce a lot of carbon dioxide. The mound is also like a physiological extension of the termites themselves: a giant lung .

Beavers’ Dams and Lodges
Beavers are the hydraulic engineers. They fell trees by gnawing through their trunks, then use the branches to dam streams. The dam ,that can reach 3 meter high and 500m, create a pound in the middle of the which the beaver family constructs an island made of more branches. The island, or beaver lodge, is a perfect home where the beavers are safe from predators.