EVERYDAY SCIENCE

Detailed explanation-1: -Lipid secreted by this gland and the epidermal cells are spread over the feathers by the bill during preening (Spearman 1983). This lipid layer forms a protective bacteriostatic layer over the skin and may explain why birds are less prone to skin infections.

Detailed explanation-2: -To facilitate that care, many bird species have a preen or uropygial gland, which opens above the base of the tail feathers and secretes a substance containing fatty acids, water, and waxes. The bird gathers this substance on its bill and applies it to its feathers.

Detailed explanation-3: -The uropygial gland is an exocrine gland located above the tail of birds that produces a diverse range of biochemicals. It has been hypothesized to be involved in chemical protection, water-proofing and maintenance of plumage brightness.

Detailed explanation-4: -The uropygial gland, or preen gland, is an essential part of preening. This gland is found near the base of the tail and produces an oily, waxy substance that helps waterproof feathers and keep them flexible. While preening, birds spread this oil to each feather so they are evenly coated and protected.

Detailed explanation-5: -The uropygial gland, informally known as the preen gland or the oil gland, is a bilobed sebaceous gland possessed by the majority of birds used to distribute the gland’s oil through the plumage by means of preening.