The bird is molting its feathers.

The molting process can be quite messy.

The moltings of the birds were scattered all over the ground.

Birds molt their feathers once a year.

The bird went through a molt and grew new feathers.

He molted his old skin and emerged with a shiny new one.

The bird had molted its feathers.

She molts her old skin every year.

The snake molted its skin.