No, I havent seen that happen. But yeah they might re-use their own nests for 2-3 years, though normally they prefer building a new nest each year.
A cuckoo does not make a nest, a cuckoo will lay an egg in another birds nest, the other bird will then care for the egg and chick as if it was it's own.
Yes and they may sometimes use the nest of another bird.
in forests or cliffs, they usually use another old birds nest
they use their eyes silly.
No. They only use the one they make themselves.
If the eggs have been left untended for more than 24 hours they most likely are or will die.
Beak
The Tailorbird uses its beak as a needle to pierce through the nest and sew it together. It also uses its feet as a tool another different types of plants as materials for the nest.
No, they chirp to each other, and they use hearing to sense danger.
a dove designs a very simple nest of twigs and grass.
Birds use both their beaks and their claws for nest building.
Example sentence - Bats and hummingbirds are considered plant pollinators.