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development of a down feather

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Ice Sledge Hockey, Hockey Canada Cup, USA (left) vs Canada, 2009. UBC Thunderbird Arena, Vancouver, BC, competition site for Olympic ice hockey and Paralympic ice sledge hockey. Vancouver 2010 Olympic and Paralympic Winter Games, Vancouver Olympics

10 Best Hockey Players of All Time

World Data Locator Map: Australia

Is Australia an Island?

Close-up of ostriches (Struthio camelus) necks and heads; location unknown.

6 of the World's Most Dangerous Birds

Entrants falling and tumbling over while chasing the cheese at the 2016 'Cheese Rolling' held at Cooper's Hill, in the Cotswolds, Brockworth England

7 of the World’s Most Dangerous Festivals

Colorful winter sunset

What's the Difference Between a Solstice and an Equinox?

The Jeff Koons tulips sculputure outside the Guggenheim Museums in Bilbao, Spain, Basque Country.

What’s the Difference Between Modern and Contemporary Art?

Town of Sisimiut located on the coast of the Davis Strait on Kangerluarsunnguaq Bay, Greenland

The Largest Islands in the World

plumule: Media

feather

Images

development of a down feather

development of a down feather

Figure 2: Development of a typical down feather. The epidermal ridges give rise to...

Encyclopædia Britannica, Inc.

feather types

feather types

Feather types and their distribution on a typical perching bird.

Encyclopædia Britannica, Inc.