Feathers are among the most complex integumentary appendages found in vertebrates and are formed in tiny follicles in the epidermis, or outer skin layer, that produce keratin proteins.

Here, we cover the breadth of feather biology by looking at feathers from a variety of scientific viewpoints including their anatomy, function, development, and evolution.

By reducing water and/or air in the product or packaging, these become more efficient to ship. At scale, these small differences in product size and weight can lead to carbon emission …

Feathers are unique to birds, and they apparently evolved from the scales of birds’ reptilian ancestors. The many different types of feathers have many different purposes, including …

Apr 30, 2025 · Feathers are a unique adaptation of birds. Feathers are made up of keratin, an insoluble protein that is also found in mammalian hair and reptilian scales.

Jun 6, 2025 · Birds are the only animals that have feathers. Feathers are a unique and complex integumentary structure found only in birds. They serve a variety of functions, including flight, …

The Science of Birds - Learn about the complex structure of feathers and the different ways they’re used by birds.

Aug 11, 2009 · The basic answer is they have feathers and also bones that are hollow, making them light and still strong. But there is more to the story of feathers than just flying.

An interactive tutorial from the Cornell Lab of Ornithology learn & teach about feathers & bird science. Diagrams, animations, videos & fun quizzes.

An interactive tutorial from the Cornell Lab of Ornithology learn & teach about feathers & bird science. Diagrams, animations, videos & fun quizzes.