Many but the best known are probably weavers and oropendolas
Well to make a birds nest you need sticks and a nice destructible spot.
with stick and old grass brown grasss
Some do but you cannot make them. You have to wait.
Out of twigs, small sticks, feathers, leaves you know the usual stuff.
they cut off twigs, branches,leaves of trees with their claws. With spit, mud, and twigs... that is easy