Usually, watchful waiting is an outpatient process and may have a duration of months or years. In contrast, medical observation is usually an inpatient process, often involving frequent or even continuous monitoring and may have a duration of hours or days. 1 Medical uses.
Shearwaters earned their name by their ability to cut - or shear - the water with their wings, although until recently they were known as 'muttonbirds'. This name was given to them by early European settlers, who killed the birds for food and found that their flesh tasted like mutton.
The Powder Down Birds have an additional type of feather. Powder down feathers are small specialized feathers that shed a very fine, white, waxy powder composed of keratin. Powder down forms a waterproof barrier for contour feathers and is spread through the feathers when the bird grooms.