Alex observed nests made by four birds - Sun bird, Weaver bird, Owl and Tailor bird. Identify the odd one out and explain it.

Sunbirds are brightly colored birds that make nests that hang from tree branches.
Tailor birds build nests inside leaves that they stitch together.
Weaver birds weave nests which hang from the trees.
Whereas owls build their nests by making holes in tree trunks.

So, owl is the odd one out.