Purple-rumped sunbirds hang down their nest feebly

 The nests of purple-rumped sunbird are never very attractive. They hand down from plants and creepers like dried leaves.

The purpose of making the nest less attractive and make it hang down on feeble creepers is for the protection of the egg and young ones from larger birds and predators. Even if they spot it they will not be able to climb on them.

Purple-rumped sunbird's nest

Purple-rumped sunbird's nest